Log Message:
net/bind918: update to 9.18.17

9.18.17 released

6206.	[bug]		Add shutdown checks in dns_catz_dbupdate_callback() to
			avoid a race with dns_catz_shutdown_catzs(). [GL #4171]

6205.	[bug]		Restore support to read legacy HMAC-MD5 K file pairs.
			[GL #4154]

6204.	[bug]		Use NS records for relaxed QNAME-minimization mode.
			This reduces the number of queries named makes when
			resolving, as it allows the non-existence of NS RRsets
			at non-referral nodes to be cached in addition to the
			referrals that are normally cached. [GL #3325]

6200.	[bug]		Fix nslookup erroneously reporting a timeout when the
			input is delayed. [GL #4044]

6199.	[bug]		Improve HTTP Connection: header protocol conformance
			in the statistics channel. [GL #4126]

6198.	[func]		Remove the holes in the isc_result_t enum to compact
			the isc_result tables. [GL #4149]

6197.	[bug]		Fix a data race between the dns_zone and dns_catz
			modules when registering/unregistering a database
			update notification callback for a catalog zone.
			[GL #4132]

6196.	[cleanup]	Report "permission denied" instead of "unexpected \ 
error"
			when trying to update a zone file on a read-only file
			system. Thanks to Midnight Veil. [GL #4134]

6193.	[bug]		Fix a catz db update notification callback registration
			logic error, which could crash named when receiving an
			AXFR update for a catalog zone while the previous update
			process of the catalog zone was already running.
			[GL #4136]

6166.	[func]		Retry without DNS COOKIE on FORMERR if it appears that
			the FORMERR was due to the presence of a DNS COOKIE
			option. [GL #4049]