* soa: make better effort in keeping addresses (c= and o= lines) in user SDP
  Ignore-this: a6da9ed249dba3309e3dbbbdb4262082
  
  The address selection logic now prefers (unicast) addresses in already
  present in SDP, if they get returned by su_getlocalinfo(). 
  
  The process currently tries to avoid link-local addresses.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11962 d0543943-73ff-0310-b7d9-9358b9ac24b2