Some tests don't have a mock root server configured, because they don't
need one. However, these tests might still leak queries to actual name
servers. Add a shared root hints file which can serve as a blackhole for
these queries.
previously, a managed-keys zone was created for every view
regardless of whether rfc5011 was in use; when it was not in
use, the zone would be left empty. this made for some confusing
log messages.
we now only set up the managed-keys zone if dnssec-validation is
set to the default value of "auto".
certain system test servers have had their dnssec-validation settings
changed to auto because the tests depended on the existence of the
zone.
This commit converts the license handling to adhere to the REUSE
specification. It specifically:
1. Adds used licnses to LICENSES/ directory
2. Add "isc" template for adding the copyright boilerplate
3. Changes all source files to include copyright and SPDX license
header, this includes all the C sources, documentation, zone files,
configuration files. There are notes in the doc/dev/copyrights file
on how to add correct headers to the new files.
4. Handle the rest that can't be modified via .reuse/dep5 file. The
binary (or otherwise unmodifiable) files could have license places
next to them in <foo>.license file, but this would lead to cluttered
repository and most of the files handled in the .reuse/dep5 file are
system test files.
