Merged revisions 303284 via svnmerge from

Merged revisions 303284 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r303284 | qwell | 2011-01-21 15:45:34 -0600 (Fri, 21 Jan 2011) | 8 lines

  Reset configuration before parsing users.conf.

  Some values configured in chan_dahdi.conf were able to leak in to users.conf
  configuration.  This was surprising users, and potentially setting non-sane
  "defaults".

  ASTNOW-125
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@303285 65c4cc65-6c06-0410-ace0-fbb531ad65f3