Merged revisions 319938 via svnmerge from

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

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  r319938 | jrose | 2011-05-20 08:28:24 -0500 (Fri, 20 May 2011) | 12 lines
  
  Adds legacy_useroption_parsing to address interoperability concerns.
  
  With the new option engaged, Asterisk should interpret user fields with useroptions
  contained within the userfield of the uri by stripping them out of the original message
  whenever a semicolon is encountered in the userfield string.
  
  (closes issue #18344)
  Reported by: danimal
  Tested by: jrose
  
  Review: https://reviewboard.asterisk.org/r/1223/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@319939 65c4cc65-6c06-0410-ace0-fbb531ad65f3