Log Message:
Update squid package to 2.5.2nb1.

- Squid may hang or behave oddly on shutdown while requests is being processed.

  synopsis	Squid may hang or otherwise behave oddly in shutdown
		if there is new requests processed at the same
		time. On shutdown Squid internally shut down DNS,
		redirectors and external acls while still processing
		new requests already received. In combination with the
		external acl queue overload bug this can completely
		hang Squid, preventing it from shutting down.
  severity	Minor
  bugzilla	#590
  versions	Squid-2.5 and earlier
  platforms	All

- external acl lookups does not deal well with queue overload

  synopsis	If there is a queue overload for external acl lookups
		then Squid logs "externalAclLookup: 'xxx' queue
		overload" at a very high rate in cache.log until the
		condition clears up.
  severity	Major
  bugzilla	#590
  versions	Squid-2.5
  platforms	All

- cache_effective_user documentation unclear

  synopsis	The cache_effective_user/group documentation was
		unclear on what happens if only one of the directives
		is set, or when Squid is started as a non-root user.
  severity	Cosmetic
  versions	Squid-2.5 and earlier
  platforms	All

- cache_peer documentation missing for htcp and carp

  synopsis	The cache_peer documentation for the htcp and carp
		related options was missing
  severity	Cosmetic
  versions	Squid-2.5 and earlier
  platforms	All