Revision 1150172

Revert r1129808:

    Incorporate the ap_ldap incomplete API, as there is no interest or effort
    at APR to make this a complete abstraction, and it was voted 'off the island'
    with APR 2.0.  This will allow httpd 2.3 to build against either apr-2.0
    or apr+util 1.x.

This also reverts part of r1142938, which needs to be re-done.