squid: extrernal grace period issues
From upstream:
http://bugs.squid-cache.org/show\_bug.cgi?id=3678
The external acl grace period seems broken and causes acl lookup
failures while
there is a pending background lookup running.
http://bugs.squid-cache.org/show\_bug.cgi?id=3679
Even if no grace= is specified there is an acl refresh grace period of
1
second.
It was fixed in edge commit:620c21a5 and needs cherry-picking to v2.5
(from redmine: issue id 1581, created on 2013-01-21, closed on 2013-01-21)