Log Message:
net/bind911: update to 9.11.18

Update bind911 to 9.11.18 (BIND 9.11.18).

	--- 9.11.18 released ---

5380.	[contrib]	Fix building MySQL DLZ modules against MySQL 8
			libraries. [GL #1678]

5379.	[doc]		Clean up serve-stale related options that leaked into
			the BIND 9.11 release. [GL !3265]

5378.	[bug]		Receiving invalid DNS data was triggering an assertion
			failure in nslookup. [GL #1652]

5377.	[feature]	Detect atomic operations support on ppc64le. Thanks to
			Petr Menšík. [GL !3295]

5376.	[bug]		Fix ineffective DNS rebinding protection when BIND is
			configured as a forwarding DNS server. Thanks to Tobias
			Klein. [GL #1574]

5368.	[bug]		Named failed to restart if 'rndc addzone' names
			contained special characters (e.g. '/'). [GL #1655]

	--- 9.11.17 released ---

5358.	[bug]		Inline master zones whose master files were touched
			but otherwise unchanged and were subsequently reloaded
			may have stopped re-signing. [GL !3135]

5357.	[bug]		Newly added RRSIG records with expiry times before
			the previous earliest expiry times might not be
			re-signed in time.  The was a side effect of 5315.
			[GL !3137]