 774.	[func]		max-cache-size is implemented.
 774.	[func]		max-cache-size is implemented.

 773.	[func]		Added isc_rwlock_trylock() to attempt to lock without
			blocking.

each/bind9-collab,pecharmin/bind9,each/bind9-collab,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,each/bind9-collab,each/bind9-collab,pecharmin/bind9,pecharmin/bind9