Fixes a documentation error introduced during the CLI cleanup at AstriDevCon 2008.

(closes issue #14655)
Reported by: ulogic
Patches:
      chan_dahdi.patch uploaded by ulogic (license 728)
Tested by: lmadsen

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@183701 65c4cc65-6c06-0410-ace0-fbb531ad65f3