added "status" checking and not processing events if we are at the max sessions or max session rate.
The load detection is primitive, it only looks at sessions and not what the action is doing (which may not involve a session)
Additionally it does not look at the actual system load, so  if you have misconfigured your max sessions you may overdrive your box and cause problems



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk/contrib@15224 d0543943-73ff-0310-b7d9-9358b9ac24b2