like bind and search.

For operations other than search, the support of the timeout depends on the
LDAP SDK supporting LDAP_OPT_TIMEOUT (e.g. OpenLDAP >= 2.4.4). An exception is
the ldap_simple_bind() in uldap_connection_open(): Here we put some extra
effort into detecting a timeout in a portable way, to catch an idle connection
having been dropped by a firewall.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@898102 13f79535-47bb-0310-9956-ffa450edef68