* nua_session.c: default to initiate session refreshes
  
  Use local refresher unless remote end explicitly indicates that it takes
  care of refreshing the session. Bug reported and initial patch by Timo
  Bruhn.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11771 d0543943-73ff-0310-b7d9-9358b9ac24b2