Recorded merge of revisions 172962 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r172962 | rmudgett | 2009-02-02 14:28:54 -0600 (Mon, 02 Feb 2009) | 11 lines

  channels/chan_dahdi.c
  *  Added doxygen comments to the major dahdi structures.
  *  Fixed PRI using an incorrect string value if the extension
  delimiter is not present in the Dial() function.
  *  Fixed some uninitialized string variables on FXS ports.

  configs/chan_dahdi.conf.sample
  *  Updated some documentation.

  These changes are already in trunk -r172400
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@172963 65c4cc65-6c06-0410-ace0-fbb531ad65f3