Give more detail regarding failures to create request with auth credentials.

(issue ASTERISK-22386)
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Merged revisions 398299 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@398300 f38db490-d61c-443f-a65b-d21fe96a405b
chan_iax2: Add missing control frame names to debug frame decode output.
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Merged revisions 398301 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 398302 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 398303 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@398304 f38db490-d61c-443f-a65b-d21fe96a405b