change all the negative values for LDAPConnPoolTTL into

-2 (AP_LDAP_CONNPOOL_INFINITE), so we can't get confused 
over -1 (AP_LDAP_CONNPOOL_DEFAULT) being merged.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1081146 13f79535-47bb-0310-9956-ffa450edef68