Blocked revisions 420060

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format.c: Add reason comments for the format_list ordering.
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Merged revisions 420054 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@420061 65c4cc65-6c06-0410-ace0-fbb531ad65f3