Ulrik Haugen <qha@lysator.liu.se>.

James R. Van Zandt <jrv@vanzandt.mv.com> contributed lots by creating
autoproject without which I wouldn't be using automake and autoconf.
getopt* and error* come from the GNU C Library.

Magenta H. Nezumi <magenta@trikuare.cx> has helped find bugs and given
valuable feedback.

Peter Pentchev <roam@ringlet.net> and Kris Kennaway 
have helped find bugs.

Graham Mitchell <graham@grahammitchell.net> contributed a performance