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.
Squashed commit of the following:
commit 7ad3daade513c94a1c92ee7c91c112f161d13ef4
Author: Mark Andrews <marka@isc.org>
Date: Mon Dec 3 15:03:44 2012 +1100
look at the second token to determine if a TXT record in of unknown format or not
commit 7df32138462646f6aee84ffa56d02ac24ec8d672
Author: Mark Andrews <marka@isc.org>
Date: Mon Dec 3 12:42:18 2012 +1100
'"\#"' was incorrectly being treated as a unknown data escape sequence.
