Log Message:
net/bind918: update to 9.18.21

9.18.21 (2023-12-20)

6297.	[bug]		Improve LRU cleaning behaviour. [GL #4448]

6296.	[func]		The "resolver-nonbackoff-tries" and
			"resolver-retry-interval" options are deprecated;
			a warning will be logged if they are used. [GL #4405]

6294.	[bug]		BIND might sometimes crash after startup or
			re-configuration when one 'tls' entry is used multiple
			times to connect to remote servers due to initialisation
			attempts from contexts of multiple threads. That has
			been fixed. [GL #4464]

6290.	[bug]		Dig +yaml will now report "no servers could be reached"
			also for UDP setup failure when no other servers or
			tries are left. [GL #1229]

6287.	[bug]		Recognize escapes when reading the public key from file.
			[GL !8502]

6286.	[bug]		Dig +yaml will now report "no servers could be reached"
			on TCP connection failure as well as for UDP timeouts.
			[GL #4396]

6282.	[func]		Deprecate AES-based DNS cookies. [GL #4421]