make LDAPConnectionPoolTTL more conservative, use r->request_time rather than

end-of-request time, and only update it after a round-trip with the LDAP
server rather than every time we check back into the pool.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1607960 13f79535-47bb-0310-9956-ffa450edef68

include/util_ldap.h

@@ -135,6 +135,7 @@ typedef struct util_ldap_connection_t {
     apr_pool_t *rebind_pool;            /* frequently cleared pool for rebind data */
     int must_rebind;                    /* The connection was last bound with other then binddn/bindpw */
     request_rec *r;                     /* request_rec used to find this util_ldap_connection_t */
+    apr_time_t last_backend_conn;       /* the approximate time of the last backend LDAP requst */
 } util_ldap_connection_t;
 
 typedef struct util_ldap_config_t {