Argh, missed one...
> received-by = ( host [ ":" port ] ) | pseudonym )
should be
received-by = ( host [ ":" port ] ) | pseudonym
...Roy T. Fielding
Department of Information & Computer Science (fielding@ics.uci.edu)
University of California, Irvine, CA 92717-3425 fax:+1(714)824-4056
http://www.ics.uci.edu/~fielding/