Merged revisions 321812-321813 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r321812 | rmudgett | 2011-06-03 14:55:21 -0500 (Fri, 03 Jun 2011) | 1 line
  
  Correct IAX2 and SIP event subscription description string.
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  r321813 | rmudgett | 2011-06-03 14:56:09 -0500 (Fri, 03 Jun 2011) | 1 line
  
  Constify subscription description parameter string.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@321814 65c4cc65-6c06-0410-ace0-fbb531ad65f3