[math-fun] misc admin

There's no need to send Math-Fun postings to both the Arizona and the Xmission addresses. Going to Xmission directly will be a little faster. I've set the mailing-list's Reply-To option to send replies to the group. If you want to send a private reply to a poster, you'll need to edit your message. A reminder that we don't have any filters for de-Mime-ing messages; please try to stick to plain ascii text. Rich rcs@cs.arizona.edu