Aaargh, I just found the answer to my question about user.coda and
groups.coda formats.  There are examples in appendix 18
(/usr/doc/coda-doc-5.2.0/html/manual-18.html#ExampleFiles, if you
installed the coda-doc RPM).

Sorry I wasted your time asking this question.

-- 
Quinn Weaver  Software Engineer  ,      Vovida Networks  http://www.vovida.com
"I'm swingin' swords          o-=*|>>>>>>>>>>            ===()==========>     
  Strictly based on keyboards".  '         --The RZA             <==()==