* nta.c: do not replace host:port in user-specified Via header 
  
  Note that port for UDP is replaced if request is stateful and there is no
  rport.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8332 d0543943-73ff-0310-b7d9-9358b9ac24b2