1.51 [KK 2007-07-10]
     - Removed global MAX_BACKEND setting. The number of back ends per
       service is now totally dynamic - derived from the
       configuration.
     - Added counts of available back ends, unavailable back ends and
       so on to "crossroads -x status". The web interface
       crossroads-mgr now picks this up.
     - Documentation updated. Small fixes.