Merged revisions 249234 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r249234 | kpfleming | 2010-02-27 09:07:59 -0500 (Sat, 27 Feb 2010) | 1 line
  
  add a reference to the now-published IAX2 RFC
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@249235 65c4cc65-6c06-0410-ace0-fbb531ad65f3