* sresolv: caching SRES_RECORD_ERR in case a CNAME is returned, too
  
  Tracing the CNAMEs when doing cache lookups.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11844 d0543943-73ff-0310-b7d9-9358b9ac24b2