Correct a typo in the help; also, ensure that the date and time are correctly

set, if not specified in the message.
(Closes issue #13594, closes issue #13595)
Reported by: alecdavis
 Patches: 
       20081001__bug13595.diff.txt uploaded by Corydon76 (license 14)
 Tested by: alecdavis


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@147592 65c4cc65-6c06-0410-ace0-fbb531ad65f3