Merged revisions 324484 via svnmerge from

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

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  r324484 | twilson | 2011-06-22 13:52:04 -0500 (Wed, 22 Jun 2011) | 20 lines
  
  Stop sending IPv6 link-local scope-ids in SIP messages
  
  The idea behind the patch listed below was used, but in a more targeted manner.
  There are now address stringification functions for addresses that are meant to
  be sent to a remote party. Link-local scope-ids only make sense on the machine
  from which they originate and so are stripped in the new functions.
  
  There is also a host sanitization function added to chan_sip which is used
  for when peer and dialog tohost fields or sip_registry hostnames are used to
  craft a SIP message.
  
  Also added are some basic unit tests for netsock2 address parsing.
  
  (closes issue ASTERISK-17711)
  Reported by: ch_djalel
  Patches:
        asterisk-1.8.3.2-ipv6_ll_scope.patch uploaded by ch_djalel (license 1251)
  
  Review: https://reviewboard.asterisk.org/r/1278/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@324487 65c4cc65-6c06-0410-ace0-fbb531ad65f3