* Changed discovery category/type from "search/text" to "directory/user".
* Fixed UnsupportedOperationException if the client did not send a iq set/get prior to conducting a search.
* Fixed a possible issue that might prevent the plugin from being destroyed completely.

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@7871 b35dd754-fafc-0310-a699-88a17e54d16e