* nta: calculate timer D correctly
  Ignore-this: f43d9dcc11fb6a19c3674a6da35ee7ec
  
  Timer D is either 32 seconds or 64 times T1, whichever is larger.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12387 d0543943-73ff-0310-b7d9-9358b9ac24b2