channels/chan_sip: Add improved support for 4xx error codes
This patch adds support for 414, 493, 479, and a stray 400 response in REGISTER
response handling. This helps interoperability in a number of scenarios.
Review: https://reviewboard.asterisk.org/r/3437
patches:
rb3437.patch uploaded by oej (License 5267)
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Merged revisions 426599 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 426600 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 426601 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 426602 from http://svn.asterisk.org/svn/asterisk/branches/13
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@426603
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