I posted this because around 2003 I spent a significant amount of time tracking it down. So I saved it, so that I wouldn't lose it, and so if I ever got arou

I posted this because around 2003 I spent a significant amount of time tracking it down. So I saved it, so that I wouldn't lose it, and so if I ever got around to writing an article about the message, I would have it handy and easy to find. This is important, because when I finally got around to writing the articles, twelve years later, I found it where I had left it. When I save something that I had trouble finding, I often try to save it in a place that other people will be able to find it, so save trouble for the next person. I don't remember where I found the paper the first time around, and I don't know if that location still exists. But stuff I throw into plover.com/~mjd/misc is (so far) available forever. There are files there that haven't been modified since 1994.