Stop locking all of the connections while trying to find an available...

Stop locking all of the connections while trying to find an available connection that meets the specified criteria.  If a connection doesn't meet the criteria, unlock it so that it remains available for other requests.

Reviewed by: bnicholes, minfrin, trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103371 13f79535-47bb-0310-9956-ffa450edef68