[JM-343] Migrated to proxool instead of homebrew connection pool handler.  Also added /proxool to admin console to see statistics from proxool.  At some point we should wrap this in a cute openfire looking page.  No API changes necessary anywhere else in code or 3rd party database connection providers!

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@9758 b35dd754-fafc-0310-a699-88a17e54d16e