knot-dns/NEWS

Knot DNS 3.0.0 (2020-09-09)
===========================

Features:
---------
 - High-performance networking mode using XDP sockets (requires Linux 4.18+)
 - Support for Catalog zones including kcatalogprint utility
 - New DNSSEC validation mode
 - New kzonesign utility — an interface for manual DNSSEC signing
 - New kxdpgun utility — high-performance DNS over UDP traffic generator for Linux
 - DoH support in kdig using GnuTLS and libnghttp2
 - New KSK revoked state (RFC 5011) in manual DNSSEC key management mode
 - Deterministic signing with ECDSA algorithms (requires GnuTLS 3.6.10+)
 - Module synthrecord supports reverse pointer shortening
 - Safe persistent zone data backup and restore

Improvements:
-------------
 - Processing depth of CNAME and DNAME chains is limited to 20
 - Non-FQDN is allowed as 'update-owner-name' configuration option value
 - Kdig prints detailed algorithm idendifier for PRIVATEDNS and PRIVATEOID
   in multiline mode #334
 - Queries with QTYPE ANY or RRSIG are always responded with at most one random RRSet
 - The statistics module has negligible performance overhead on modern CPUs
 - If multithreaded zone signing is enabled, some additional zone maintenance
   steps are newly parallelized
 - ACL can be configured by reference to a remote
 - Better CPU cache locality for higher query processing performance
 - Logging to non-syslog streams contains timestamps with the timezone
 - Keeping initial DNSKEY TTL and zone maximum TTL in KASP database to ensure
   proper rollover timing in case of TTL changes during the rollover
 - Responding FORMERR to queries with more OPT records

Bugfixes:
---------
 - Module onlinesign responds NXDOMAIN insted of NOERROR (NODATA) if DNSSEC not requested
 - Outgoing multi-message transfer can contain invalid compression pointers under specific conditions

Knot DNS 2.9.6 (2020-08-31)
===========================

Features:
---------
 - New kdig option '+[no]opttext' to print unknown EDNS options as text if possible (Thanks to Robert Edmonds)

Improvements:
-------------
 - Better error message if no key is ready for submission
 - Improved logging when master is not usable
 - Improved control logging of zone-flush errors if output directory is specified
 - More precise system error messages when a zone transfer fails
 - Some documentation improvements (especially Offline KSK)

Bugfixes:
---------
 - In the case of many zones, control operations over all zones take lots of memory
 - Misleading error message on keymgr import-bind #683
 - DS push is triggered upon every zone change even though CDS wasn't changed
 - Kzonecheck performance penalty with passive keys #688
 - CSK->KSK+ZSK scheme rollover can end too early

Knot DNS 2.9.5 (2020-05-25)
===========================

Bugfixes:
---------
 - Old ZSK can be withdrawn too early during a ZSK rollover if maximum zone TTL
   is computed automatically
 - Server responds SERVFAIL to ANY queries on empty non-terminal nodes

Improvements:
-------------
 - Also module onlinesign returns minimized responses to ANY queries
 - Linking against libcap-ng can be disabled via a configure option

Knot DNS 2.9.4 (2020-05-05)
===========================

Improvements:
-------------
 - ANY query over UDP is always answered with one RRSet + possible RRSIG instead
   of truncated reply
 - Server tries to resolve CNAME record generated by geoip module (Thanks to Conrad Hoffmann)
 - Earlier OCSP validity check in kdig certificate verification (Thanks to Alexander Schultz)
 - Module onlinesign allows KSK + ZSK mode
 - Server control listen backlog limit was increased to 5
 - Zone signing event is always re-scheduled even after a signing error
 - Extended error checks and tiny enhancements in kjournalprint
 - kdig logs a more detailed error message when failed to acquire a remote address
 - Some documentation improvements

Bugfixes:
---------
 - Server can crash when zone update fails due to exceeded zone size limit
 - keymgr 'share' command doesn't work
 - Shared KSK doesn't work with an initial key
 - Self-created RRSIGs are still cryptographically verified in some unnecessary cases
 - Changed NSEC3PARAM not correctly detected during zone update
 - NSEC(3) chain not fixed if affected by zone udpate
 - knotc orphan purge doesn't work on journal
 - Online signing configured along with DNSSEC signing can cause MDB_BAD_RSLOT
   error during server reload
 - Zone journal access can stuck if mismanaged zone serial
 - Concurrently added and removed same records in a DDNS message are not properly handled
 - Zone check logs error instead of warning after a first error occured

Knot DNS 2.9.3 (2020-03-03)
===========================

Features:
---------
 - New configuration option 'remote.block-notify-after-transfer' to suppress
   sending NOTIFY messages
 - Enabled testing support for Ed448 DNSSEC algorithm (requires GnuTLS 3.6.12+
   and not-yet-released Nettle 3.6+)
 - New keymgr parameter 'local-serial' for getting/setting signed zone SOA serial
   in the KASP database
 - keymgr can import Ed25519 and Ed448 keys in the BIND format (Thanks to Conrad Hoffmann)

Improvements:
-------------
 - kdig returns error if the query name is invalid
 - Increased 'server.tcp-io-timeout' default value to 500 ms
 - Decreased 'database.journal-db-max-size' default value to 512 MiB on 32-bit systems
 - Server no longer falls back to AXFR if master is outdated during zone refresh
 - Some documentation improvements (including new EPUB format and compatibility
   with Ultra Electronics CIS Keyper Plus HSM)
 - Some packaging improvements (including new python3-libknot deb package)

Bugfixes:
---------
 - Outgoing IXFR can be malformed if the message size has specific size
 - Server can crash if the zone contains solo NSEC3 record
 - Improved compatibility with older journal format
 - Incorrect SOA TTL in negative answers — SOA minimum not considered
 - Cannot unset uppercase nodes via control interface #668
 - Module RRL doesn't set AA flag and NOERROR rcode in slipped responses
 - Server returns FORMERR instead of NOTIMP if empty QUESTION and unknown OPCODE

Knot DNS 2.9.2 (2019-12-12)
===========================

Improvements:
-------------
 - Tiny ds-check log message rewording
 - Some unnecessary code cleanup

Bugfixes:
---------
 - ds-push doesn't replace the DS RRset on the parent #661
 - Server gets stuck in a never-ending logging loop when changing SOA TTL
 - Server can crash when the journal database size limit is reached
 - Server can create a bogus changeset with equal serials from and to
 - Unreasonable re-signing of the NSEC3PARAM record when reloading the zone
   and 'zonefile-load: difference-no-serial' is configured
 - SOA RRSIG not updated if the only changed record is SOA
 - Failed to remove NSEC3 records through the control interface #666
 - Failed to stop the server if a zone transaction is active

Knot DNS 2.9.1 (2019-11-11)
===========================

Features:
---------
 - New option for OCSP stapling '+[no]tls-ocsp-stapling[=H]' in kdig (Thanks to Alexander Schultz)

Improvements:
-------------
 - Kdig always randomizes source TCP port on recent Linux #575
 - Server no longer warns about disabled zone file synchronization during shutdown
 - Zone loading stops if failed to load zone from the journal
 - Speed-up of insertion to big RRSets
 - Various code and documentation improvements

Bugfixes:
---------
 - Failed to apply journal changes after upgrade #659
 - Failed to finish zone loading if journal changeset serials from and to are equal
 - Incorrect handling of 0 value for 'tcp-io-timeout' and 'tcp-remote-io-timeout' configuration
 - Server can crash if zone transaction is open during zone update
 - NSEC3 chain not fully updated if NSEC3 salt changes during zone update
 - Server can crash when flushing zone to a specified directory
 - Server can respond incorrect NSEC3 records after NSEC3 salt change
 - Delegation glue records not updated after specific zone change

Knot DNS 2.9.0 (2019-10-10)
===========================

Features:
---------
 - Full support for different master/slave serial arithmetics when on-slave signing
 - Module geoip newly supports wildcard records #650
 - New DNSSEC policy configuration option 'rrsig-pre-refresh' for reducing
   frequency of the zone signing event
 - New server configuration option 'tcp-reuseport' for setting SO_REUSEPORT(_LB)
   mode on TCP sockets
 - New server configuration option 'tcp-io-timeout' [ms] for restricting inbound
   IO operations over TCP #474

Improvements:
-------------
 - Significant speed-up of zone contents modifications
 - Avoided double zone signing during CSK rollovers
 - Self-created RRSIGs are not cryptographically verified if not necessary
 - Zone journal can store two changesets if zone file difference computing
   and DNSSEC signing are enabled. The first one containing the difference of
   zone history needed by slave servers, the second one containing the difference
   between zone file and zone needed for server restart
 - Universal and more robust memory clearing
 - More precise socket timeout handling
 - New notice log message for configuration changes requiring server restart
 - Module RRL logs both trigger source address and affected subnet
 - Various code (especially zone and TCP processing) and documentation improvements

Bugfixes:
---------
 - RRSIGs are wrongly checked for inconsistent RRSet TTLs during zone update
 - DS check/push warnings after disabled DNSSEC signing
 - NSEC3 records not accessible through control interface
 - Module geoip doesn't accept underscore character in dname specification #655

Compatibility:
--------------
 - Removed runtime reconfiguration of network workers and interfaces since
   it was imperfect and also couldn't work after dropped process privileges
 - Removed inaccurate and misleading knotc command 'zone-memstats' because
   memory consumption varies during zone modifications or transfers
 - Removed useless 'zone.request-edns-option' configuration option
 - Reimplemented DNS Cookies to be interoperable (based on draft-ietf-dnsop-server-cookies
   and work by Witold Kręcicki)
 - Default limit on TCP clients is auto-configured to one half of the file
   descriptor limit for the server process
 - Number of open files limit is set to 1048576 in upstream packages
 - Default number of TCP workers is equal to the number of online CPUs or at least 10
 - Default EDNS buffer size is 1232 for both IPv4 and IPv6
 - Removed 'tcp-handshake-timeout' server configuration option
 - Some configuration options were renamed and possibly moved. Old names will
   be supported at least until next major release:
    - 'server.tcp-reply-timeout' [s] to 'server.tcp-remote-io-timeout' [ms]
    - 'server.max-tcp-clients'       to 'server.tcp-max-clients'
    - 'server.max-udp-payload'       to 'server.udp-max-payload'
    - 'server.max-ipv4-udp-payload'  to 'server.udp-max-payload-ipv4'
    - 'server.max-ipv6-udp-payload'  to 'server.udp-max-payload-ipv6'
    - 'template.journal-db'          to 'database.journal-db'
    - 'template.journal-db-mode'     to 'database.journal-db-mode'
    - 'template.max-journal-db-size' to 'database.journal-db-max-size'
    - 'template.kasp-db'             to 'database.kasp-db'
    - 'template.max-kasp-db-size'    to 'database.kasp-db-max-size'
    - 'template.timer-db'            to 'database.timer-db'
    - 'template.max-timer-db-size'   to 'database.timer-db-max-size'
    - 'zone.max-journal-usage'       to 'zone.journal-max-usage'
    - 'zone.max-journal-depth'       to 'zone.journal-max-depth'
    - 'zone.max-zone-size'           to 'zone.zone-max-size'
    - 'zone.max-refresh-interval'    to 'zone.refresh-max-interval'
    - 'zone.min-refresh-interval'    to 'zone.refresh-min-interval'

Knot DNS 2.8.5 (2020-01-01)
===========================

Improvements:
-------------
 - Tiny ds-check log message rewording
 - Various code and documentation improvements

Bugfixes:
---------
 - RRSIGs are wrongly checked for inconsistent RRSet TTLs during zone update
 - Server can crash when flushing zone to a specified directory
 - ds-push doesn't replace the DS RRset on the parent #661
 - Server gets stuck in a never-ending logging loop when changing SOA TTL
 - Server can crash when the journal database size limit is reached
 - Server can create a bogus changeset with equal serials from and to
 - Server returns FORMERR instead of NOTIMP if empty QUESTION and unknown OPCODE

Knot DNS 2.8.4 (2019-09-24)
===========================

Features:
---------
 - Automatic uploading of DS records to parent zone using DDNS,
   see 'policy.ds-push' configuration option

Improvements:
-------------
 - Incoming IXFR no longer falls back to AXFR if connection error #642
 - More accurate semantic checks for missing glue records
 - Various code and documentation improvements

Bugfixes:
---------
 - Failed to read/export configuration if 'acl.update-type' is set #651
 - Failed to generate initial zero-length salt
 - Missing error log for invalid rrtype input to dynamic configuration #652
 - Missing error log when AXFR processing fails to store zone data
 - Redundant notice log about unavailable persistent configuration DB
 - Zone not flushed after retransfer if SOA serial not changed
 - Zone contents not properly fixed during zone transfers
 - No changeset created for updated rrset's TTL if changed by RR addition

Knot DNS 2.8.3 (2019-07-16)
===========================

Features:
---------
 - Added cert/key file configuration for TLS in kdig (Thanks to Alexander Schultz)

Improvements:
-------------
 - More verbose log message for offline-KSK signing
 - Module RRL logs affected source address subnet instead of only one source address
 - Extended DNSSEC policy configuration checks
 - Various improvements in the documentation

Bugfixes:
---------
 - Excessive server load when maximum TCP clients limit is reached
 - Incorrect reply after zone update with a node changed from non-authoritative to delegation
 - Wrong error line number in a config file if it contains leading tab character
 - Config file error message contains unrelated parsing context
 - NSEC3 salt not updated when reconfigured to zero length
 - Kjournalprint sometimes prints a random value for per-zone occupation
 - Missing debug log for failed zone refresh triggered by zone notification
 - DS check not scheduled when reconfigured
 - Broken unit test on NetBSD 8.x

Knot DNS 2.8.2 (2019-06-05)
===========================

Features:
---------
 - New blocking mode for zone event triggers in knotc
 - New weighted records mode in the module geoip (Thanks to Conrad Hoffmann)
 - Module noudp allows UDP allow rate configuration

Improvements:
-------------
 - NSEC3 salt lifetime can be set to infinity
 - New 'running' zone event status in the knotc output
 - Knotc in the forced mode returns failure also if zone check emits any warning
 - Ignoring PMTU information for IPv4/UDP via IP_PMTUDISC_OMIT (Thanks to Daisuke Higashi)
 - Various improvements in the documentation

Bugfixes:
---------
 - Broken setting of CPU affinity for UDP workers
 - Unexpected results with the geoip subnet mode
 - Sometimes insufficient zone adjusting
 - Incoherent DNSKEY RRSIG lifetimes in SKR
 - Confusing output from keymgr if an error occurs during KSR generation
 - Non-functional changeset history depth limitation in kjournalprint
 - Wrong processing of multiple $INCLUDE directives #646

Knot DNS 2.8.1 (2019-04-09)
===========================

Improvements:
-------------
 - Possible zone transaction is aborted by zone events to avoid inconsistency
 - Added log message if no persistent config DB is available during 'conf-begin'
 - New environment setting 'KNOT_VERSION_FORMAT=release' for extended version suppression
 - Various improvements in the documentation

Bugfixes:
---------
 - Broken NSEC3-wildcard-nonexistence proof after NSEC3 re-salt
 - Glue records under delegation are sometimes signed
 - RRL doesn't work correctly on big-endian architectures
 - NSEC3 not re-salted during AXFR refresh
 - Failed to sign new zone contents if added dynamically #641
 - NSEC3 opt-out signing doesn't work in some cases
 - Broken NSEC3 chain after adding new sub-delegations
 - Redundant SOA RRSIG on slave if RRSIG TTL changed on master
 - Sometimes confusing log error message for NOTIFY event
 - Improper include for LMDB #638

Knot DNS 2.8.0 (2019-03-05)
===========================

Features:
---------
 - New offline-KSK mode of operation
 - Configurable multithreaded DNSSEC signing for large zones
 - Extended ACL configuration for dynamic updates
 - New knotc trigger 'zone-key-rollover' for immediate DNSKEY rollover
 - Added support for OPENPGPKEY, CSYNC, SMIMEA, and ZONEMD RR types
 - New 'double-ds' option for CDS/CDNSKEY publication

Improvements:
-------------
 - Significant speed-up of zone updates
 - Knotc supports force option in the interactive mode
 - Copy-on-write support for QP-trie (Thanks to Tony Finch)
 - Unified and more efficient LMDB layer for journal, timer, and KASP databases
 - DS check event is re-planned according to KASP even when purged timers
 - Module DNS Cookies supports explicit Server Secret configuration
 - Zone mtime is verified against full-precision timestamp (Thanks to Daniel Kahn Gillmor)
 - Extended logging (loaded SOA serials, refresh duration, tiny cleanup)
 - Relaxed fixed-length condition for DNSSEC key ID
 - Extended semantic checks for DNAME and NS RR types
 - Added support for FreeBSD's SO_REUSEPORT_LB
 - Improved performance of geoip module
 - Various improvements in the documentation

Compatibility:
--------------
 - Changed configuration default for 'cds-cdnskey-publish' to 'rollover'
 - Journal DB format changes are not downgrade-compatible
 - Keymgr no longer prints DS for algorithm SHA-1

Knot DNS 2.7.8 (2019-07-16)
===========================

Improvements:
-------------
 - Various improvements in the documentation

Bugfixes:
---------
 - Excessive server load when maximum TCP clients limit is reached
 - Incorrect reply after zone update with a node changed from non-authoritative to delegation
 - Missing debug log for failed zone refresh triggered by zone notification
 - Wrong processing of multiple $INCLUDE directives #646
 - Broken unit test on NetBSD 8.x

Knot DNS 2.7.7 (2019-04-15)
===========================

Improvements:
-------------
 - Possible zone transaction is aborted by zone events to avoid inconsistency
 - Added log message if no persistent config DB is available during 'conf-begin'
 - Tiny building improvements

Bugfixes:
---------
 - Glue records under delegation are sometimes signed
 - NSEC3 not re-salted during AXFR refresh
 - Broken NSEC3 chain after adding new sub-delegations
 - Failed to sign new zone contents if added dynamically #641
 - NSEC3 opt-out signing doesn't work in some cases
 - Redundant SOA RRSIG on slave if RRSIG TTL changed on master
 - Sometimes confusing log error message for NOTIFY event
 - Failed to explicit set value 0 for submission timeout

Knot DNS 2.7.6 (2019-01-23)
===========================

Improvements:
-------------
 - Zone status also shows when the zone load is scheduled
 - Server workers status also shows background workers utilization
 - Default control timeout for knotc was increased to 10 seconds
 - Pkg-config files contain auxiliary variable with library filename

Bugfixes:
---------
 - Configuration commit or server reload can drop some pending zone events
 - Nonempty zone journal is created even though it's disabled #635
 - Zone is completely re-signed during empty dynamic update processing
 - Server can crash when storing a big zone difference to the journal
 - Failed to link on FreeBSD 12 with Clang

Knot DNS 2.7.5 (2019-01-07)
===========================

Features:
---------
 - Keymgr supports NSEC3 salt handling

Improvements:
-------------
 - Zone history in journal is dropped apon AXFR-like zone update
 - Libdnssec is no longer linked against libm #628
 - Libdnssec is explicitly linked against libpthread if PKCS #11 enabled #629
 - Better support for libknot packaging in Python
 - Manually generated KSK is 'ready' by default
 - Kdig supports '+timeout' as an alias for '+time'
 - Kdig supports '+nocomments' option
 - Kdig no longer prints empty lines between retries
 - Kdig returns failure if operations not successfully resolved #632
 - Fixed repeating of the 'KSK submission, waiting for confirmation' log
 - Various improvements in documentation, Dockerfile, and tests

Bugfixes:
---------
 - Knotc fails to unset huge configuration section
 - Kjournalprint sometimes fails to display zone journal content
 - Improper timing of ZSK removal during ZSK rollover
 - Missing UTC time zone indication in the 'iso' keymgr list output
 - A race condition in the online signing module

Knot DNS 2.7.4 (2018-11-13)
===========================

Features:
---------
 - Added SNI configuration for TLS in kdig (Thanks to Alexander Schultz)

Improvements:
-------------
 - Added warning log when DNSSEC events not successfully scheduled
 - New semantic check on timer values in keymgr
 - DS query no longer asks other addresses if got a negative answer
 - Reintroduced 'rollover' configuration option for CDS/CDNSKEY publication
 - Extended logging for zone loading
 - Various documentation improvements

Bugfixes:
---------
 - Failed to import module configuration #613
 - Improper Cflags value in libknot.pc if built with embedded LMDB #615
 - IXFR doesn't fall back to AXFR if malformed reply
 - DNSSEC events not correctly scheduled for empty zone updates
 - During algorithm rollover old keys get removed before DS TTL expires #617
 - Maximum zone's RRSIG TTL not considered during algorithm rollover #620

Knot DNS 2.7.3 (2018-10-11)
===========================

Features:
---------
 - New queryacl module for query access control
 - Configurable answer rrset rotation #612
 - Configurable NSEC bitmap in online signing

Improvements:
-------------
 - Better error logging for KASP DB operations #601
 - Some documentation improvements

Bugfixes:
---------
 - Keymgr "list" output doesn't show key size for ECDSA algorithms #602
 - Failed to link statically with embedded LMDB
 - Configuration commit causes zone reload for all zones
 - The statistics module overlooks TSIG record in a request
 - Improper processing of an AXFR-style-IXFR response consisting of one-record messages
 - Race condition in online signing during key rollover #600
 - Server can crash if geoip module is enabled in the geo mode

Knot DNS 2.7.2 (2018-08-29)
===========================

Improvements:
-------------
 - Keymgr list command displays also key size
 - Kjournalprint displays total occupied size in the debug mode
 - Server doesn't stop if failed to load a shared module from the module directory
 - Libraries libcap-ng, pthread, and dl are linked selectively if needed

Bugfixes:
---------
 - Sometimes incorrect result from dnssec_nsec_bitmap_contains (libdnssec)
 - Server can crash when loading zone file difference and zone-in-journal is set
 - Incorrect treatment of specific queries in the module RRL
 - Failed to link module Cookies as a shared library

Knot DNS 2.7.1 (2018-08-14)
===========================

Improvements:
-------------
 - Added zone wire size information to zone loading log message
 - Added debug log message for each unsuccessful remote address operation
 - Various improvements for packaging

Bugfixes:
---------
 - Incompatible handling of RRSIG TTL value when creating a DNS message
 - Incorrect RRSIG TTL value in zone differences and knotc zone operation outputs
 - Default configure prefix is ignored

Knot DNS 2.7.0 (2018-08-03)
===========================

Features:
---------
 - New DNS Cookies module and related '+cookie' kdig option
 - New module for response tailoring according to client's subnet or geographic location
 - General EDNS Client Subnet support in the server
 - OSS-Fuzz integration (Thanks to Jonathan Foote)
 - New '+ednsopt' kdig option (Thanks to Jan Včelák)
 - Online Signing support for automatic key rollover
 - Non-normal file (e.g. pipe) loading support in zscanner #542
 - Automatic SOA serial incrementation if non-empty zone difference
 - New zone file load option for ignoring zone file's SOA serial
 - New build-time option for alternative malloc specification
 - Structured logging for DNSSEC key submission event
 - Empty QNAME support in kdig

Improvements:
-------------
 - Various library and server optimizations
 - Reduced memory consumption of outgoing IXFR processing
 - Linux capabilities use overhaul #546 (Thanks to Robert Edmonds)
 - Online Signing properly signs delegations and CNAME records
 - CDS/CDNSKEY rrset is signed with KSK instead of ZSK
 - DNSSEC-related records are ignored when loading zone difference with signing enabled
 - Minimum allowed RSA key length was increased to 1024
 - Removed explicit dependency on Nettle

Bugfixes:
---------
 - Possible uninitialized address buffer use in zscanner
 - Possible index overflow during multiline record parsing in zscanner
 - kdig +tls sometimes consumes 100 % CPU #561
 - Single-Type Signing doesn't work with single ZSK key #566
 - Zone not flushed after re-signing during zone load #594
 - Server crashes when committing empty zone transaction
 - Incoming IXFR with on-slave signing sometimes leads to memory corruption #595

Compatibility:
--------------
 - Removed obsolete RRL configuration
 - Removed obsolete module names 'mod-online-sign' and 'mod-synth-record'
 - Removed obsolete 'ixfr-from-differences' configuration option
 - Removed old journal migration
 - Removed module rosedb

Knot DNS 2.6.9 (2018-08-14)
===========================

Improvements:
-------------
 - Added zone wire size to zone loading log message
 - Added debug log message for each unsuccessful remote address operation

Bugfixes:
---------
 - Zone not flushed after re-signing during zone load #594
 - Server crashes when committing empty zone transaction
 - Incoming IXFR with on-slave signing sometimes leads to memory corruption #595

Knot DNS 2.6.8 (2018-07-10)
===========================

Features:
---------
 - New 'import-pkcs11' command in keymgr

Improvements:
-------------
 - Unixtime serial policy mimics Bind – increment if lower #593

Bugfixes:
---------
 - Creeping memory consuption upon server reload #584
 - Kdig incorrectly detects QNAME if 'notify' is a prefix
 - Server crashes when zone sign fails #587
 - CSK->KZSK rollover retires CSK early #588
 - Server crashes when zone expires during outgoing multi-message transfer
 - Kjournalprint doesn't convert zone name argument to lower-case
 - Cannot switch to a previously used ksk-shared dnssec policy #589

Knot DNS 2.6.7 (2018-05-17)
===========================

Features:
---------
 - Added 'dateserial' (YYYYMMDDnn) serial policy configuration (Thanks to Wolfgang Jung)

Improvements:
-------------
 - Trailing data indication from the packet parser (libknot)
 - Better configuration check for a problematical option combination

Bugfixes:
---------
 - Incomplete configuration option item name check
 - Possible buffer overflow in 'knot_dname_to_str' (libknot)
 - Module dnsproxy doesn't preserve letter case of QNAME
 - Module dnsproxy duplicates OPT and TSIG in the non-fallback mode

Knot DNS 2.6.6 (2018-04-11)
===========================

Features:
---------
 - New EDNS option counters in the statistics module
 - New '+orphan' filter for the 'zone-purge' operation

Improvements:
-------------
 - Reduced memory consuption of disabled statistics metrics
 - Some spelling fixes (Thanks to Daniel Kahn Gillmor)
 - Server no longer fails to start if MODULE_DIR doesn't exist
 - Configuration include doesn't fail if empty wildcard match
 - Added a configuration check for a problematical option combination

Bugfixes:
---------
 - NSEC3 chain not re-created when SOA minimum TTL changed
 - Failed to start server if no template is configured
 - Possibly incorrect SOA serial upon changed zone reload with DNSSEC signing
 - Inaccurate outgoing zone transfer size in the log message
 - Invalid dname compression if empty question section
 - Missing EDNS in EMALF responses

Knot DNS 2.6.5 (2018-02-12)
===========================

Features:
---------
 - New 'zone-notify' command in knotc
 - Kdig uses '@server' as a hostname for TLS authenticaion if '+tls-ca' is set

Improvements:
-------------
 - Better heap memory trimming for zone operations
 - Added proper polling for TLS operations in kdig
 - Configuration export uses stdout as a default output
 - Simplified detection of atomic operations
 - Added '--disable-modules' configure option
 - Small documentation updates

Bugfixes:
---------
 - Zone retransfer doesn't work well if more masters configured
 - Kdig can leak or double free memory in corner cases
 - Inconsistent error outputs from dynamic configuration operations
 - Failed to generate documentation on OpenBSD

Knot DNS 2.6.4 (2018-01-02)
===========================

Features:
---------
 - Module synthrecord allows multiple 'network' specification
 - New CSK handling support in keymgr

Improvements:
-------------
 - Allowed configuration for infinite zsk lifetime
 - Increased performance and security of the module synthrecord
 - Signing changeset is stored into journal even if 'zonefile-load' is whole

Bugfixes:
---------
 - Unintentional zone re-sign during reload if empty NSEC3 salt
 - Inconsistent zone names in journald structured logs
 - Malformed outgoing transfer for big zone with TSIG
 - Some minor DNSSEC-related issues

Knot DNS 2.6.3 (2017-11-24)
===========================

Bugfixes:
---------
 - Wrong detection of signing scheme rollover

Knot DNS 2.6.2 (2017-11-23)
===========================

Features:
---------
 - CSK algorithm rollover and (KSK, ZSK) <-> CSK rollover support

Improvements:
-------------
 - Allowed explicit configuration for infinite ksk lifetime
 - Proper error messages instead of unclear error codes in server log
 - Better support for old compilers

Bugfixes:
---------
 - Unexpected reply for DS query with an owner below a delegation point
 - Old dependencies in the pkg-config file

Knot DNS 2.6.1 (2017-11-02)
===========================

Features:
---------
 - NSEC3 Opt-Out support in the DNSSEC signing
 - New CDS/CDNSKEY publish configuration option

Improvements:
-------------
 - Simplified DNSSEC log message with DNSKEY details
 - +tls-hostname in kdig implies +tls-ca if neither +tls-ca nor +tls-pin is given
 - New documentation sections for DNSSEC key rollovers and shared keys
 - Keymgr no longer prints useless algorithm number for generated key
 - Kdig prints unknown RCODE in a numeric format
 - Better support for LLVM libFuzzer

Bugfixes:
---------
 - Faulty DNAME semantic check if present in the zone apex and NSEC3 is used
 - Immediate zone flush not scheduled during the zone load event
 - Server crashes upon dynamic zone addition if a query module is loaded
 - Kdig fails to connect over TLS due to SNI is set to server IP address
 - Possible out-of-bounds memory access at the end of the input
 - TCP Fast Open enabled by default in kdig breaks TLS connection

Knot DNS 2.6.0 (2017-09-29)
===========================

Features:
---------
 - On-slave (inline) signing support
 - Automatic DNSSEC key algorithm rollover
 - Ed25519 algorithm support in DNSSEC (requires GnuTLS 3.6.0)
 - New 'journal-content' and 'zonefile-load' configuration options
 - keymgr tries to run as user/group set in the configuration
 - Public-only DNSSEC key import into KASP DB via keymgr
 - NSEC3 resalt and parent DS query events are persistent in timer DB
 - New processing state for a response suppression within a query module
 - Enabled server side TCP Fast Open if supported
 - TCP Fast Open support in kdig

Improvements:
-------------
 - Better record owner compression if related to the previous rdata dname
 - NSEC(3) chain is no longer recomputed whole on every update
 - Remove inconsistent and unnecessary quoting in log files
 - Avoiding of overlapping key rollovers at a time
 - More DNSSSEC-related semantic checks
 - Extended timestamp format in keymgr

Bugfixes:
---------
 - Incorrect journal free space computation causing inefficient space handling
 - Interface-automatic broken on Linux in the presence of asymmetric routing

Knot DNS 2.5.7 (2018-01-02)
===========================

Bugfixes:
---------
 - Unintentional zone re-sign during reload if empty NSEC3 salt
 - Inconsistent zone names in journald structured logs
 - Malformed outgoing transfer for big zone with TSIG
 - Unexpected reply for DS query with an owner below a delegation point
 - Old dependencies in the pkg-config file

Knot DNS 2.5.6 (2017-11-02)
===========================

Improvements:
-------------
 - Keymgr no longer prints useless algorithm number for generated key

Bugfixes:
---------
 - Faulty DNAME semantic check if present in the zone apex and NSEC3 is used
 - Immediate zone flush not scheduled during the zone load event
 - Server crashes upon dynamic zone addition if a query module is loaded
 - Kdig fails to connect over TLS due to SNI is set to server IP address

Knot DNS 2.5.5 (2017-09-29)
===========================

Improvements:
-------------
 - Constant time memory comparison in the TSIG processing
 - Proper use of the ctype functions
 - Generated RRSIG records have inception time 90 minutes in the past

Bugfixes:
---------
 - Incorrect online signature for NSEC in the case of a CNAME record
 - Incorrect timestamps in dnstap records
 - EDNS Subnet Client validation rejects valid payloads
 - Module configuration semantic checks are not executed
 - Kzonecheck segfaults with unusual inputs

Knot DNS 2.5.4 (2017-08-31)
===========================

Improvements:
-------------
 - New minimum and maximum refresh interval config options (Thanks to Manabu Sonoda)
 - New warning when unforced flush with disabled zone file synchronization
 - New 'dnskey' keymgr command
 - Linking with libatomic on architectures that require it (Thanks to Pierre-Olivier Mercier)
 - Removed 'OK' from listing keymgr command outputs
 - Extended journal and keymgr documentation and logging

Bugfixes:
---------
 - Incorrect handling of specific corner-cases with zone-in-journal
 - The 'share' keymgr command doesn't work
 - Server crashes if configured with query-size and reply-size statistics options
 - Malformed big integer configuration values on some 32-bit platforms
 - Keymgr uses local time when parsing date inputs
 - Memory leak in kdig upon IXFR query

Knot DNS 2.5.3 (2017-07-14)
===========================

Features:
---------
 - CSK rollover support for Single-Type Signing Scheme

Improvements:
-------------
 - Allowed binding to non-local adresses for TCP (Thanks to Julian Brost!)
 - New documentation section for manual DNSSEC key algorithm rollover
 - Initial KSK also generated in the submission state
 - The 'ds' keymgr command with no parameter uses all KSK keys
 - New debug mode in kjournalprint
 - Updated keymgr documentation

Bugfixes:
---------
 - Sometimes missing RRSIG by KSK in submission state.
 - Minor DNSSEC-related issues

Knot DNS 2.5.2 (2017-06-23)
===========================

Security:
---------
 - CVE-2017-11104: Improper TSIG validity period check can allow TSIG forgery (Thanks to Synacktiv!)

Improvements:
-------------
 - Extended debug logging for TSIG errors
 - Better error message for unknown module section in the configuration
 - Module documentation compilation no longer depends on module configuration
 - Extended policy section configuration semantic checks
 - Improved python version compatibility in pykeymgr
 - Extended migration section in the documentation
 - Improved DNSSEC event timing on 32-bit systems
 - New KSK rollover start log info message
 - NULL qtype support in kdig

Bugfixes:
---------
 - Failed to process included configuration
 - dnskey_ttl policy option in the configuration has no effect on DNSKEY TTL
 - Corner case journal fixes (huge changesets, OpenWRT operation)
 - Confusing event timestamps in knotc zone-status output
 - NSEC/NSEC3 bitmap not updated for CDS/CDNSKEY
 - CDS/CDNSKEY RRSIG not updated

Knot DNS 2.5.1 (2017-06-07)
===========================

Bugfixes:
---------
 - pykeymgr no longer crash on empty json files in the KASP DB directory
 - pykeymgr no longer imports keys in the "removed" state
 - Imported keys in the "removed" state no longer makes knotd to crash
 - Including an empty configuration directory no longer makes knotd to crash
 - pykeymgr is distributed and installed to the distribution tarball

Knot DNS 2.5.0 (2017-06-05)
===========================

Features:
---------
 - KASP database switched from JSON files to LMDB database
 - KSK rollover support using CDNSKEY and CDS in the automatic DNSSEC signing
 - Dynamic module loading support with proper module API
 - Journal can store full zone contents (not only differences)
 - Zone freeze/thaw support
 - Updated knotc zone-status output with optional column filters
 - New '[no]crypto' option in kdig
 - New keymgr implementation reflecting KASP database changes
 - New pykeymgr for JSON-based KASP database migration
 - Removed obsolete knot1to2 utility

Improvements:
-------------
 - Added libidn2 support to kdig (with libidn fallback)
 - Maximum timer database switched from configure to the server configuration

Knot DNS 2.4.4 (2017-06-05)
===========================

Improvements:
-------------
 - Improved error handling in kjournalprint

Bugfixes:
---------
 - Zone flush not replanned upon unsuccessful flush
 - Journal inconsistency after deleting deleted zone
 - Zone events not rescheduled upon server reload (Thanks to Mark Warren)
 - Unreliable LMDB mapsize detection in kjournalprint
 - Some minor issues found by AddressSanitizer

Knot DNS 2.4.3 (2017-04-11)
===========================

Improvements:
-------------
 - New 'journal-db-mode' optimization configuration option
 - The default TSIG algorithm for utilities input is HMAC-SHA256
 - Implemented sensible default EDNS(0) padding policy (Thanks to D. K. Gillmor)
 - Added some more semantic checks on the knotc configuration operations

Bugfixes:
---------
 - Missing 'zone' keyword in the YAML output
 - Missing trailing dot in the keymgr DS owner output
 - Journal logs 'invalid parameter' in several cases
 - Some minor journal-related problems

Knot DNS 2.4.2 (2017-03-23)
===========================

Features:
---------
 - Zscanner can store record comments placed on the same line
 - Knotc status extension with version, configure, and workers parameters

Improvements:
-------------
 - Significant incoming XFR speed-up in the case of many zones

Bugfixes:
---------
 - Double OPT RR insertion when a global module returns KNOT_STATE_FAIL
 - User-driven zscanner parsing logic inconsistency
 - Lower serial at master doesn't trigger any errors
 - Queries with too long DNAME substitution do not return YXDOMAIN response
 - Incorrect elapsed time in the DDNS log
 - Failed to process forwarded DDNS request with TSIG

Knot DNS 2.4.1 (2017-02-10)
===========================

Improvements:
-------------
 - Speed-up of rdata addition into a huge rrset
 - Introduce check of minimum timeout for next refresh
 - Dnsproxy module can forward all queries without local resolving

Bugfixes:
--------
 - Transfer of a huge rrset goes into an infinite loop
 - Huge response over TCP contains useless TC bit instead of SERVFAIL
 - Failed to build utilities with disabled daemon
 - Memory leaks during keys removal
 - Rough TSIG packet reservation causes early truncation
 - Minor out-of-bounds string termination write in rrset dump
 - Server crash during stop if failed to open timers DB
 - Failed to compile on OS X older than Sierra
 - Poor minimum UDP-max-size configuration check
 - Failed to receive one-record-per-message IXFR-style AXFR
 - Kdig timeouts when receiving RCODE != NOERROR on subsequent transfer message

Knot DNS 2.4.0 (2017-01-18)
===========================

Bugfixes:
--------
 - False positive semantic-check warning about invalid bitmap in NSEC
 - Unnecessary SOA queries upon notify with up to date serial
 - Timers for expired zones are reset on reload
 - Zone doesn't expire when the server is down
 - Failed to handle keys with duplicate keytags
 - Per zone module and global module insconsistency
 - Obsolete online signing module configuration
 - Malformed output from kjournalprint
 - Redundant SO_REUSEPORT activation on the TCP socket
 - Failed to use higher number of background workers

Improvements:
-------------
 - Lower memory consumption with qp-trie
 - Zone events and zone timers improvements
 - Print all zone names in the FQDN format
 - Simplified query module interface
 - Shared TCP connection between SOA query and transfer
 - Response Rate Limiting as a module with statistics support
 - Key filters in keymgr

Features:
---------
 - New unified LMDB-based zone journal
 - Server statistics support
 - New statistics module for traffic measuring
 - Automatic deletion of retired DNSSEC keys
 - New control logging category

Knot DNS 2.3.4 (2017-11-20)
===========================

Security:
---------
 - CVE-2017-11104: Improper TSIG validity period check can allow TSIG forgery (Thanks to Synacktiv!)

Bugfixes:
---------
 - Unexpected response for DS query below delegation poing
 - Zone events not rescheduled upon server reload (Thanks to Mark Warren)
 - Missing trailing dot in the keymgr DS owner output
 - Malformed output from kjournalprint
 - Redundant SO_REUSEPORT activation on the TCP socket

Knot DNS 2.3.3 (2016-12-08)
===========================

Bugfixes:
---------
 - Double free when failed to apply zone journal
 - Zone bootstrap retry interval not preserved upon zone reload
 - DNSSEC related records not flushed if not signed
 - False semantic checks warning about incorrect type in NSEC bitmap
 - Memory leak in kzonecheck

Improvements:
-------------
 - All zone names are fully-qualified in log

Features:
---------
 - New kjournalprint utility

Knot DNS 2.3.2 (2016-11-04)
===========================

Bugfixes:
---------
 - Incorrect %s expansion for the root zone
 - Failed to refresh not existing slave zone after restart
 - Immediate zone refresh upon restart if refresh already scheduled
 - Early zone transfer after restart if transfer already scheduled
 - Not ignoring empty non-terminal parents during delegation lookup
 - CD bit preservation in responses
 - Compilation error on GNU/kFreeBSD
 - Server crash after double zone-commit if journal error

Improvements:
-------------
 - Speed-up of knotc if control operation and known socket
 - Zone purge operation purges also zone timers

Features:
---------
 - Simple modules don't require empty configuration section
 - New zone journal path configuration option
 - New timeout configuration option for module dnsproxy

Knot DNS 2.3.1 (2016-10-07)
===========================

Bugfixes:
---------
 - Missing glue records in some responses
 - Knsupdate prompt printing on non-terminal
 - Mismatch between configuration policy item names and documentation
 - Segfault on OS X (Sierra)

Improvements:
-------------
 - Significant speed-up of conf-commit and conf-diff operations (in most cases)
 - New EDNS Client Subnet libknot API
 - Better semantic-checks error messages

Features:
---------
 - Print TLS certificate hierarchy in kdig verbose mode
 - New +subnet alias for +client
 - New mod-whoami and mod-noudp modules
 - New zone-purge control command
 - New log-queries and log-responses options for mod-dnstap

Knot DNS 2.3.0 (2016-08-09)
===========================

Bugfixes:
---------
 - No wildcard expansion below empty non-terminal for NSEC signed zone
 - Avoid multiple loads of the same PKCS #11 module
 - Fix kdig IXFR response processing if the transfer content is empty
 - Don't ignore non-existing records to be removed in IXFR

Improvements:
-------------
 - Refactored semantic checks and improved error messages
 - Set TC flag in delegation only if mandatory glue doesn't fit the response
 - Separate EDNS(0) payload size configuration for IPv4 and IPv6

Features:
---------
 - DNSSEC policy can be defined in server configuration
 - Automatic NSEC3 resalt according to DNSSEC policy
 - Zone content editing using control interface
 - Zone size limit restriction for DDNS, AXFR, and IXFR (CVE-2016-6171)
 - DNS-over-TLS support in kdig (RFC 7858)
 - EDNS(0) padding and alignment support in kdig (RFC 7830)

Knot DNS 2.2.1 (2016-05-24)
===========================

Bugfixes:
---------
 - Fix separate logging of server and zone events
 - Fix concurrent zone file flushing with many zones
 - Fix possible server crash with empty hostname on OpenWRT
 - Fix control timeout parsing in knotc
 - Fix "Environment maxreaders limit reached" error in knotc
 - Don't apply journal changes on modified zone file
 - Remove broken LTO option from configure script
 - Enable multiple zone names completion in interactive knotc
 - Set the TC flag in a response if a glue doesn't fit the response
 - Disallow server reload when there is an active configuration transaction

Improvements:
-------------
 - Distinguish unavailable zones from zones with zero serial in log messages
 - Log warning and error messages to standard error output in all utilities
 - Document tested PKCS #11 devices
 - Extended Python configuration interface

Knot DNS 2.2.0 (2016-04-26)
===========================

Bugfixes:
---------
 - Fix build dependencies on FreeBSD
 - Fix query/response message type setting in dnstap module
 - Fix remote address retrieval from dnstap capture in kdig
 - Fix global modules execution for queries hitting existing zones
 - Fix execution of semantic checks after an IXFR transfer
 - Fix PKCS#11 support detection at build time
 - Fix kdig failure when the first AXFR message contains just the SOA record
 - Exclude non-authoritative types from NSEC/NSEC3 bitmap at a delegation
 - Mark PKCS#11 generated keys as sensitive (required by Luna SA)
 - Fix error when removing the only zone from the server
 - Don't abort knotc transaction when some check fails

Features:
---------
 - URI and CAA resource record types support
 - RRL client address based white list
 - knotc interactive mode

Improvements:
-------------
 - Consistent IXFR error messages
 - Various fixes for better compatibility with PKCS#11 devices
 - Various keymgr user interface improvements
 - Better zone event scheduler performance with many zones
 - New server control interface
 - kdig uses local resolver if resolv.conf is empty

Knot DNS 2.1.1 (2016-02-10)
===========================

Bugfixes:
---------
 - DNSSEC: Allow import of duplicate private key into the KASP
 - DNSSEC: Avoid duplicate NSEC for Wildcard No Data answer
 - Fix server crash when an incoming transfer is in progress and reload is issued
 - Fix socket polling when configured with many interfaces and threads
 - Fix compilation against Nettle 3.2

Improvements:
-------------
 - Select correct source address for UDP messages received on ANY address
 - Extend documentation of knotc commands

Knot DNS 2.1.0 (2016-01-14)
===========================

Features:
---------
 - Per-thread UDP socket binding using SO_REUSEPORT on Linux
 - Support for dynamic configuration database
 - DNSSEC: Support for cryptographic tokens via PKCS #11 interface
 - DNSSEC: Experimental support for online signing

Improvements:
-------------
 - Support for zone file name patterns
 - Configurable location of zone timer database
 - Non-blocking network operations and better timeout handling
 - Caching of Critical configuration values for better performance
 - Logging of ACL failures
 - RRL: Add rate-limit-slip zero support to drop all responses
 - RRL: Document behavior for different rate-limit-slip options
 - kdig: Warning instead of error on TSIG validation failure
 - Cleanup of support libraries interfaces (libknot, libzscanner, libdnssec)
 - Remove possibly insecure server control over a network socket
 - Remove implementation limit for the number of network interfaces

Bugfixes:
---------
 - synth-record module: Fix application of default configuration options
 - TSIG: Allow compressed TSIG name when forwarding DDNS updates
 - Schedule zone bootstrap after slave zone fails to load from disk

Knot DNS 2.0.2 (2015-11-24)
===========================

Bugfixes:
---------
 - Out-of-bound read in packet parser for malformed NAPTR records (LibFuzzer)

Knot DNS 2.0.1 (2015-09-02)
===========================

Bugfixes:
---------
 - Do not reload expired zones on 'knotc reload' and server startup
 - Fix rare race-condition in event scheduling causing delayed event execution
 - Fix skipping of non-authoritative nodes in NSEC proofs
 - Fix TC flag setting in RRL slipped answers
 - Disable domain name compression for root label
 - Log via journald only when running under systemd
 - Fix CNAME following when quering for NSEC RR type
 - Fix refreshing of DNSSEC signatures for zone keys
 - Fix binding an unavailable IPv6 address on Linux (IP_FREEBIND)
 - Fix infinite loop in knotc zonestatus and memstats
 - Fix memory leak in configuration on server shutdown
 - Fix broken dnsproxy module
 - Fix DNSSEC KASP timestamps parsing in strict POSIX environment
 - Fix multi value parsing on big-endian
 - Adapt to Nettle 3 API break causing base64 decoding failures on big-endian

Features:
---------
 - Add 'keymgr zone key ds' to show key's DS record
 - Add 'keymgr tsig generate' to generate TSIG keys
 - Add query module scoping to process either all queries or zone queries only
 - Add support for file name globbing in config file includes
 - Add 'request-edns-option' config option to add custom EDNS0 option into
   server initiated queries

Improvements:
-------------
 - Send minimal responses (remove NS from Authority section for NOERROR)
 - Update persistent timers only on shutdown for better performance
 - Allow change of RR TTL over DDNS
 - Documentation fixes, updates, and improvements in formatting
 - Install yparser and zscanner header files
 - Improve lookup of libsystemd build dependencies
 - Fix compilation warnings in endian conversion functions on OpenBSD

Knot DNS 2.0.0 (2015-06-26)
===========================

Bugfixes:
---------
 - Fix lost NOTIFY message if received during zone transfer
 - Disable fast zone parser when compiled in Clang (workaround for Clang bug)
 - kdig: Record correct dnstap SocketProtocol when retrying over TCP
 - kdig: Hide TSIG section with +noall
 - Do not set AA flag for AXFR/IXFR queries

Features:
---------
 - DNSSEC: separate library, switch to GnuTLS, new utilities
 - DNSSEC: basic KASP support (generate initial keys, ZSK rollover)
 - Configuration: New text format in YAML, binary store in LMDB
 - Zone parser: Split long TXT/SPF strings into multiple strings
 - kdig: Add generic dump style option (+generic)
 - Try all master servers in multi-master environment
 - Improved remotes and ACLs (multiple addresses, multiple keys)
 - Basic support for zone file patterns (%s to substitute zone name)
 - Disable zone file synchronization by setting 'zonefile_sync' to '-1'
 - knsupdate: Add input prompt in interactive mode and 'quit' command
 - knsupdate: Allow TSIG algorithm specification in interactive prompt

Improvements:
-------------
 - Zone dump: Do not write class for SOA record (unified with other RR types)
 - Zone dump: Do not write master server address into the zone file
 - Documentation: Manual pages are included in HTML and PDF

Knot DNS 1.6.3 (2015-04-08)
===========================

Bugfixes:
---------
 - Performance drop for NSEC-signed zones
 - Proper handling of TCP short-writes
 - Out-of-bound read in zone parser for long domain names in origin (AFL fuzzer)
 - Out-of-bound read in packet parser for TSIG RR without RDATA (AFL fuzzer)
 - Out-of-bound read in packet parser for malformed NAPTR RR (AFL fuzzer)

Features:
--------
 - CDS and CDNSKEY support in zone parser

Improvements:
-------------
 - Add defaults for TCP config options into documentation
 - Detailed error message if zone reload fails

Knot DNS 1.6.2 (2015-02-19)
===========================

Features:
---------
 - Limiting number of parallel TCP clients (max-tcp-clients config option)

Bugfixes:
---------
 - Ignore refresh and transfer events on non-slave zones
 - Compilation with Dnstap support on FreeBSD
 - Possible file descriptor leak when terminating inactive TCP clients

Knot DNS 1.6.1 (2014-12-13)
===========================

Bugfixes:
---------
 - Journal file would sometimes outgrow its limit (ixfr-fslimit in configuration)
 - Fixed incompatibility with OpenSSL 0.9.8
 - Proper handling when hostname cannot be retreived (for NSID and CH)

Features:
---------
 - DNSSEC Single Type Signing Scheme is now supported

Knot DNS 1.6.0 (2014-10-23)
===========================

Bugfixes:
---------
 - Fix zone expiration when AXFR/IXFR is being refused by master
 - Fix forced zone refresh on slave (knotc refresh -f)

Knot DNS 1.6.0-rc2 (2014-10-17)
===============================

Improvements:
-------------
 - Maximal size of persistent timers database increased from 10 MB to 100 MB
 - Added logging of persistent timers database errors

Bugfixes:
---------
 - Persistent timers database opening after privileges has been dropped

Knot DNS 1.6.0-rc1 (2014-10-13)
===============================

Features:
---------
 - Persistent timers for slave zones (expire, refresh, and flush)

Bugfixes:
---------
 - DNSSEC: RFC compliant processing of letter case in RDATA domain names
 - EDNS: Return minimal error response for queries with unsupported version
 - EDNS: Fix interpretation of Extended RCODE

Knot DNS 1.5.3 (2014-09-15)
===========================

Bugfixes:
---------
 - Some specific incoming IXFRs were causing server to crash
 - Rare sychronization error during reload caused read-after-free
 - Response synthetization module did not work properly with DNSSEC-enabled zones
 - When Knot sent AXFR when IXFR was requested, message ID and opcode were wrong
 - Knot failed to send large messages to remote control (present since 1.5.1)

Knot DNS 1.5.2 (2014-09-08)
===========================

Bugfixes:
---------
 - Some RR parsing corner cases were not handled properly
 - AXFR-style IXFR was refused and had to be retransferred
 - Hash character (#) was not properly escaped when storing text zone file

Knot DNS 1.5.1 (2014-08-19)
===========================

Features:
---------
 - Basic support for logging using systemd journal
 - DDNS: Ability to process updates in bulk

Improvements:
-------------
 - Unified logging messages structure
 - DNSSEC: More strict controls for signing keys

Bugfixes:
---------
 - DNSSEC: DNAMEs in RDATA were not lowercased before signing
 - EDNS: OPT RR were not put into responsing for some errors
 - TSIG: DDNS responses were not signed with TSIG
 - DDNS: Prerequisite checks failed for some inputs
 - knsupdate: Zone origin was not used for deletions

Knot DNS 1.5.0 (2014-07-08)
===========================

Features:
---------
 - DDNS forwarding reimplemented

Improvements:
-------------
 - Transfer sizes logged in bytes if needed
 - Logging outgoing NOTIFY messages
 - Logging unauthorized incoming NOTIFYs

Bugfixes:
---------
 - Zone flush planning after bootstrap
 - Incorrect incoming AXFR message sizes
 - DDNS signing changes were freed too soon, posibility of stale data
 - knotc remote control key handling

Knot DNS 1.5.0-rc2 (2014-06-18)
===============================

Features:
---------
 - edns-client-subnet support in kdig
 - Optional asynchronous startup (config "asynchronous-start")

Improvements:
-------------
 - Preempt task queue for faster reload
 - Lazy zone file write after zone transfer (governed by
   "zonefile-sync")

Bugfixes:
---------
 - Close zone transfer after SERVFAIL response
 - Incremental to full zone transfer fallback, wrong log message
 - Zone events corner cases, reload replanning

Knot DNS 1.5.0-rc1 (2014-06-03)
===============================

Features:
---------
 - Pluggable query processing modules
 - Synthetic IPv4/IPv6 reverse/forward records (optional module)
 - dnstap support in both utilities & server (optional module)
 - NOTIFY message support and new TSIG section in kdig
 - Zone transfer master failover

Improvements:
-------------
 - Query processing and core functionality overhaul
 - Performance and reduced memory footprint
 - Faster zone events scheduling
 - RFC compliant queries/responses in some corner cases
 - Log messages
 - New documentation (Sphinx)

Knot DNS 1.4.2 (2014-01-27)
===========================

Bugfixes:
---------
 - AXFR/IXFR compatibility issues with tinydns/axfrdns
 - Journal file is created only when needed
 - Zone-related log messages are logged into correct category
 - DNSSEC: Refresh signatures earlier (3 days before their expiration
    with the default signature lifetime)
 - Fixed RCU synchronization causing deadlock on 'knotc signzone'
 - RRSIG not fitting in the additional records doesn't cause
   truncation

Knot DNS 1.4.1 (2014-01-13)
===========================

Bugfixes:
---------
 - Empty APL record support
 - 'zonestatus' when using immediate zone syncing
 - Immediate zone syncing after reload
 - Race condition writing time values to zone file

Knot DNS 1.4.0 (2014-01-06)
===========================

Features:
---------
 - Zone SERIAL policies (INCREMENT, UNIXTIME)
 - IDN support in Knot utilities
 - DNSSEC: support for GOST algorithm
 - Better logging of automatic DNSSEC events
 - Support for DNSSEC key pre-publication
 - Experimental automatic DNSSEC signing
 - Reduced memory usage

Improvements:
-------------
 - ./configure prints build configuration summary
 - Pretty zone file output (DNSSEC-related data separately)
 - Lower memory consumption
 - config: option 'dnssec-keydir' can be set per zone
 - config: option 'storage' can be set per zone

Bugfixes:
---------
 - AXFR crash with specific packet
 - QNAME case-sensitive since 1.4.0-rc0
 - DNSSEC records over DDNS
 - Semantic check fail in AXFR is only soft-error
 - Journal race condition
 - Notifies are sent immediately
 - Crash in particular additionals processing
 - Race condition in event cancellation
 - Journal corruption after failed transactions
 - DNSSEC: fixed detection of ECDSA support
 - Refactored zone loading
 - Improved journal locking and fixed some race conditions
 - Various fixes in client utilities
 - Fixed memory errors in automatic DNSSEC signing
 - 'dnssec-keydir' doesn't auto-enable signing
 - Fixed rescheduling of zone resigns

Knot DNS 1.3.3 (2013-10-28)
===========================

Bugfixes:
---------
 - Improved zone loading error messages
 - Correct control socket permissions
 - Improved log syntax documentation
 - Fixed wrong assertions in DDNS prerequisites checking
 - Fixed processing of some malformed DNS packets
 - Fixed notify messages being ignored in some cases

Knot DNS 1.3.2 (2013-09-30)
===========================

Bugfixes:
---------
 - Configuration option for EDNS0 max UDP payload.
 - Max UDP payload from EDNS0 affected TCP responses.
 - Fixed build on SLE 10.
 - knotc reload did not close files included from config.

Knot DNS 1.3.1 (2013-08-26)
===========================

Bugfixes:
---------
 - Response with NSID contained extra bytes after reload
 - List of remotes is scanned for longest prefix match
 - Multipacket TSIG signatures for transfers
 - Wrongly parsed TSIG key secret without quotes
 - Removed autoconf checks for extended instruction sets

Knot DNS 1.3.0 (2013-08-05)
===========================

Features:
---------
 - Defaults for CH TXT id.server,version.server (see doc)
 - Much faster bootstrap of many zones
 - --with-configdir option for default config path
 - Reintroducted 'pidfile' config option
 - Utility to estimate memory consumption (see 'knotc memstats')
 - PID file is not created when running on foreground
 - UNIX sockets support for knotc
 - Configurable 'rundir' and 'storage'
 - Faster zone parser
 - Full support for EUI and ILNP resource records
 - Lower memory footprint for large zones
 - No compilation of zones
 - Improved scheduling of zone transfers
 - Logging of serials and timing information for zone transfers
 - Config: 'groups' keyword allowing to create groups of remotes
 - Config: 'include' keyword allowing other file includes
 - Client utilities: kdig, khost, knsupdate
 - Server identification using TXT/CH queries (RFC 4892)
 - Improved build scripts
 - Improved dname compression and performance

Bugfixes:
---------
 - Progressive interval for bootstrap retry
 - Transfers randomly cancelled
 - Disabling RRL on reload
 - Secondary groups not initialized when dropping privileges
 - Responding to DS queries for names at or below delegation points
 - Removed deprecated 'knotc -w' option
 - Slave ignores out-of-zone records in zone
 - Support for obsolete types in zone transfers
 - Slave zone file names fixes
 - Long transfers being randomly dropped
 - AXFR/IXFR subsystem performance improvements
 - Rescheduling of AXFR in some cases
 - RRSIGs not in the same section for DS records
 - Log messages leaking to syslog
 - 'knotc restart' option removed due to several limitations
 - IXFR with an arbitrary number of diffs
 - Processing of knotc TSIG keyfile
 - Atomic PID file writing, removed deprecated 'knotc start'
 - Performance regression when RRSIGs came before covered RRs in AXFR
 - Label compression related bug
 - Proper resolution of some CNAME chains
 - Unstable response rate in rare cases
 - Several log messages
 - Fixed creating of PID file when dropping privileges

Knot DNS 1.2.0 (2013-03-29)
===========================

Features:
---------
 - knotc 'zonestatus' command
 - Response rate limiting (see documentation)
 - Dynamic updates, including forwarding (limited on signed zones)
 - Updated remote control utility
 - Configurable TCP timeouts
 - LOC RR support

Bugfixes:
---------
 - Memory leaks
 - Check for broken recvmmsg() implementation
 - Changing logfile ownership before dropping privileges
 - knotc respects 'control' section from configuration
 - RRL: resolved bucket collisions
 - RRL: updated bucket mapping to conform RRL technical memo
 - Fixed OpenBSD build
 - Responses to ANY should contain RRSIGs
 - Fixed processing of some non-standard dnames.
 - Correct checking of label length bounds in some cases.
 - More compliant rcodes in case of DDNS/TSIG failures.
 - Correct processing of malformed DDNS prereq section.

Knot DNS 1.1.3 (2012-12-19)
===========================

Bugfixes:
---------
 - Updated manpage.
 - Fixed answering DS queries (RRSIGs not together with DS, AA bit
    missing).
 - Fixed setting ARCOUNT in some error responses with EDNS enabled.
 - Fixed crash when compiling zone zone with NSEC3PARAM but no NSEC3
    and semantic checks enabled.

Knot DNS 1.1.2 (2012-11-21)
===========================

Bugfixes:
---------
 - Fixed debug message.
 - Fixed crash on reload when config contained duplicate zones.
 - Fixed scheduling of transfers.

Knot DNS 1.1.1 (2012-10-31)
===========================

Features:
---------
 - Improved compression of packets. Out-of-zone dnames present in
    RDATA were not compressed.
 - Slave zones are now automatically refreshed after startup.
 - Proper response to IXFR/UDP query (returns SOA in Authority
   section).

Bugfixes:
---------
 - Fixed assertion failing when asking directly for a wildcard name.
 - Crash after IXFR in certain cases when adding RRSIG in an IXFR.
 - Fixed behaviour when incoming IXFR removes a zone cut. Previously
    occluded names now become properly visible. Previously lead to a
    crash when the server was asked for the previously occluded name.
 - Fixed handling of zero-length strings in text zone dump. Caused the
    compilation to fail.
 - Fixed TSIG algorithm name comparison - the names should be in
    canonical form.
 - Fixed handling unknown RR types with type less than 251.

Knot DNS 1.1.0 (2012-08-31)
===========================

Features:
---------
 - Signing SOA with TSIG queries when checking zone version with
   master.
 - Optionally disable ANY queries for authoritative answers.
 - Dropping identical records in zone and incoming transfers.
 - Support for '/' in zone names.
 - Generating journal from reloaded zone (EXPERIMENTAL).
 - Outgoing-only interfaces in configuration file.
 - Following DNAME if the synthetized name is in the same zone.

Bugfixes:
---------
 - Syncing journal to zone was not updating the compiled zone
   database.
 - Fixed ixfr-from-differences journal generation in case of IPSECKEY
    and APL records.
 - Fixed possible leak on server shutdown with a pending transfer.
 - Crash when zone contained RRSIG signing a CNAME, but did not
    contain the CNAME.
 - Malformed packets parsing.
 - Failed IXFR caused memory leaks.
 - Failed IXFR might have resulted in inconsistent zone structures.
 - Fixed answering to +dnssec queries when NSEC3 chain is corrupted.
 - Fixed answering when transitioning from NSEC3 to NSEC.
 - Fixed answering when zone contains multiple NSEC3 chains.
 - Handling RRSets with different TTLs - TTL from the first RR is
   used.
 - Synchronization of zone reload and zone transfers.
 - Fixed build on NetBSD 5 and FreeBSD.
 - Fixed binding to both IPv4 and IPv6 at the same time on special
    interfaces.
 - Fixed access rights of created files.
 - Semantic checks corrupted RDATA domain names which are covered by
    wildcard in the same zone.

Improvements:
-------------
 - Improved user manual.
 - Better checks of corrupted zone database.
 - IXFR-in optimized.
 - Many zones loading optimized.
 - More detailed log messages (mostly transfer-related).
 - Copying Question section to error responses.
 - Using zone name from config file as default origin in zone file.
 - Additional records are now added to response also from
    wildcard-covered names.

Knot DNS 1.0.6 (2012-06-13)
===========================

Bugfixes:
---------
 - Fixed potential problems with RCU synchronization.
 - Adding NSEC/NSEC3 for all wildcard CNAMEs in the response.

Knot DNS 1.0.5 (2012-05-17)
===========================

Bugfixes:
---------
 - Fixed bug with creating journal files.

Knot DNS 1.0.4 (2012-05-16)
===========================

Features:
---------
 - Parallel loading of zones to the server.
 - RFC3339-complaint format of log time.
 - Support for TLSA (RR type 52).
 - knotc checkzone (as a dry-run of zone compile).
 - knotc refresh for forcing Knot to update all zones from master
    servers.
 - Reopening log files upon start (used to truncate them).

Improvements:
-------------
 - Significantly sped up IXFR-in and reduced its memory requirements.

Bugfixes:
---------
 - Copying OPCODE and RD bit from query to NOTIMPL responses.
 - Corrected response to CNAME queries if the canonical name was also
    an alias (was adding the whole CNAME chain to the response).
 - Fixed crash when NS or MX points to an alias.
 - Fixed problem with early closing of filedescriptors (lead to crash
    when compiling and loading or bootstrapping and restarting the
    server with a lot of zones).

Knot DNS 1.0.3 (2012-04-17)
===========================

Bugfixes:
---------
 - Corrected handling of EDNS0 when TCP is used (was applying the UDP
   size limit).
 - Fixed slow compilation of zones.
 - Fixed potential crash with many concurrent transfers.
 - Fixed missing include for FreeBSD.

Knot DNS 1.0.2 (2012-04-13)
===========================

Features:
---------
 - Configuration checker (invoked via knotc).
 - Specifying source interface for transfers and NOTIFY requests
   directly.

Bugfixes:
---------
 - Fixed leak when querying non-existing name and zone SOA TTL >
   minimal.
 - Fixed some minor bugs in tansfers.

Improvements:
-------------
 - Improved log messages (added date and time, better specification of
   XFR remote).
 - Improved saving incoming IXFR to journal (memory optimized).
 - Now using system scheduler (better for Linux).
 - Decreased thread stack size.

Knot DNS 1.0.1 (2012-05-09)
===========================

Features:
---------
 - Implemented jitter to REFRESH/RETRY timers.
 - Implemented magic bytes for journal.
 - Improved error messages.

Bugfixes:
---------
 - Problem with creating IXFR journal for bootstrapped zone.
 - Race condition in processing NOTIFY/SOA queries.
 - Leak when reloading zone with NSEC3.
 - Processing of APL RR.
 - TSIG improper assignment of algorithm type.

Knot DNS 1.0.0 (2012-02-29)
===========================

Features:
---------
 - Support for subnets in ACL.
 - Debug messages enabling in configure.
 - Optimized memory consuption of zone structures.
 - NSID support (RFC5001).
 - Root zone support.
 - Automatic zone compiling on server start.
 - Setting user to run Knot under in config file.
 - Dropping privileges after binding to port 53.
    + Support for Linux capabilities(7).
 - Setting source address of outgoing transfers in config file.
 - Custom PID file.
 - CNAME loop detection.
 - Timeout on TCP connections.
 - Basic defense against DoS attacks.

Bugfixes:
---------
 - Memory errors and leaks.
 - Fixed improper handling of failed IXFR/IN.
 - Several other minor bugfixes.
 - Fixed IXFR processing.
 - Patched URCU so that it compiles on architectures without TLS in
   compiler (NetBSD, OpenBSD).
 - Fixed response to DS query at parent zone.
 - A lot of other bugfixes.

Knot DNS 0.9.1 (2012-01-20)
===========================

Features:
---------
 - RRSet rotation

Improvements:
-------------
 - Replaced pseudo-random number generator by one with MIT/BSD
   license.

Bugfixes:
---------
 - Fixed build on BSD.
 - Fixes in parsing and dumping of zone RR types IPSECKEY, WKS, DLV,
    APL, NSAP

Knot DNS 0.9.0 (2012-01-13)
===========================

Features:
---------
 - TSIG support in both client and server.
 - Use of sendmmsg() on Linux 3.0+ (improves performance).

Bugfixes:
---------
 - Knot was not accepting AXFR-style IXFR with first SOA in a separate
    packet (i.e. from Power DNS).
 - Wrong SOA TTL in negative answers.
 - Wrong max packet size for outgoing transfers (was causing the
    packets to be malformed).
 - Wrong handling of WKS record in zone compiler.
 - Problems with zone bootstrapping.

Knot DNS 0.8.1 (2011-12-01)
===========================

Bugfixes:
---------
 - Handling SPF record.
 - Wrong text dump of unknown records.

Knot DNS 0.8.0 (2011-11-03)
===========================

Features:
---------
 - First Public Release
 - AXFR-in/-out
 - IXFR-in/-out
 - EDNS0
 - DNSSEC
 - NSEC3
 - IPv6
 - Runtime reconfiguration

Known issues:
-------------
 - Missing support for TSIG
 - Root zone support
 - NSID support
 - Other DNS classes than IN
 - RRSet rotation not implmented
 - Dynamic update support
 - IXFR code might be flaky sometimes
 - IXFR may be slow when too much (10 000+) RRSets are transferred at
   once