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4773.	[doc]		Fixed generating Doxygen documentation for functions
			annotated using certain macros.  Miscellaneous
			Doxygen-related cleanups. [RT #46276]

- some typos
- call out removed features in a "Removed Features" section
- mention TAT logging

- fixed some typos
- call out feature removals in a "Removed Features" section
- TAT logging

This change is only applied to master for consistency with other
branches, where it is required to fix the filter-aaaa system test for
builds without DNSSEC support.

This reverts commit 8422d43d.

This reverts commit 560d8b83.

This change created a potential race between key refresh queries and
root zone priming queries which could leave the root name servers in
the bad-server cache.

4773.	[bug]		Keys specified in "managed-keys" statements
			can now only be used when validating key refresh
			queries during initialization of RFC 5011 key
			maintenance. If initialization fails, DNSSEC
			validation of normal queries will also fail.
			Previously, validation of normal queries could
			succeed using the initializing key, potentially
			masking problems with managed-keys. [RT #46077]

4772.	[test]		Expanded unit testing framework for libns, using
			hooks to interrupt query flow and inspect state
			at specified locations. [RT #46173]

4771.	[bug]		When sending RFC 5011 refresh queries, disregard
			cached DNSKEY rrsets. [RT #46251]

4770. [bug] Cache additional data from priming queries as glue.
Previously they were ignored as unsigned
non-answer data from a secure zone, and never
actually got added to the cache, causing hints
to be used frequently for root-server
addresses, which triggered re-priming. [RT #45241]

[master] make writable directory and managed-keys directory mandatory - check in load_configuration (cherry-picked from rt46077b)

4769.   [bug]           The working directory and managed-keys directory has
                        to be writeable (and seekable). [RT #46077]