* nua_stack.c: include Allow-Events in requests initiating dialog, too
    
  The Allow-Events header is now alwats included with NOTIFY requests, and
  initial INVITE, SUBSCRIBE, REFER, and OPTIONS requests.
  
  Thanks to Jerry Richards for pointing out the problem.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8467 d0543943-73ff-0310-b7d9-9358b9ac24b2