* check_sres_sip.c: use S2_CASE()
  Ignore-this: da194ea35fa98a73f3da3b4b5257aa8f



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12737 d0543943-73ff-0310-b7d9-9358b9ac24b2