Log Message:
net/bind916: update to 9.16.21

--- 9.16.21 released ---

5711.	[bug]		"map" files exceeding 2GB in size failed to load due to
			a size comparison that incorrectly treated the file size
			as a signed integer. [GL #2878]

5710.	[port]		win32: incorrect parentheses resulted in the wrong
			sizeof() tests being used to pick the appropriate
			Windows atomic operations for the object's size.
			[GL #2891]

5709.	[cleanup]	Enum values throughout the code have been updated
			to use the terms "primary" and "secondary" instead of
			"master" and "slave", respectively. [GL #1944]

5708.	[bug]		The thread-local isc_tid_v variable was not properly
			initialized when running BIND 9 as a Windows Service,
			leading to a crash on startup. [GL #2837]

5705.	[bug]		Change #5686 altered the internal memory structure of
			zone databases, but neglected to update the MAPAPI value
			for zone files in "map" format. This caused named to
			attempt to load incompatible map files, triggering an
			assertion failure on startup. The MAPAPI value has now
			been updated, so named rejects outdated files when
			encountering them. [GL #2872]

5704.	[bug]		Change #5317 caused the EDNS TCP Keepalive option to be
			ignored inadvertently in client requests. It has now
			been fixed and this option is handled properly again.
			[GL #1927]

5701.	[bug]		named-checkconf failed to detect syntactically invalid
			values of the "key" and "tls" parameters used to define
			members of remote server lists. [GL #2461]

5700.	[bug]		When a member zone was removed from a catalog zone,
			journal files for the former were not deleted.
			[GL #2842]

5699.	[func]		Data structures holding DNSSEC signing statistics are
			now grown and shrunk as necessary upon key rollover
			events. [GL #1721]

5698.	[bug]		When a DNSSEC-signed zone which only has a single
			signing key available is migrated to use KASP, that key
			is now treated as a Combined Signing Key (CSK).
			[GL #2857]

5696.	[protocol]	Support for HTTPS and SVCB record types has been added.
			(This does not include ADDITIONAL section processing for
			these record types, only basic support for RR type
			parsing and printing.) [GL #1132]

5694.	[bug]		Stale data in the cache could cause named to send
			non-minimized queries despite QNAME minimization being
			enabled. [GL #2665]

5691.	[bug]		When a dynamic zone was made available in another view
			using the "in-view" statement, running "rndc freeze"
			always reported an "already frozen" error even though
			the zone was successfully frozen. [GL #2844]

5690.	[func]		dnssec-signzone now honors Predecessor and Successor
			metadata found in private key files: if a signature for
			an RRset generated by the inactive predecessor exists
			and does not need to be replaced, no additional
			signature is now created for that RRset using the
			successor key. This enables dnssec-signzone to gradually
			replace RRSIGs during a ZSK rollover. [GL #1551]