Added option to delete the current service in xcap_rls_services

darcs-hash:20081127120609-1e3d8-cde7d2ebe2367bfc65c150c9b900a1052ee30791
Added message describing service uri managed in xcap_rls_services

darcs-hash:20081127122440-1e3d8-a9f84253351869d2144d64aee91d2a6052fbecd5