* sdp_parse.c: use lower-case udptl 
  
  According to T.38 V3.4 some implementations are case-sensitive when checking
  transport protocol name. Thanks to Timo Bruhn for the hint.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10816 d0543943-73ff-0310-b7d9-9358b9ac24b2