WebAuth pages

I finally had a chance to look at the old WebAuth pages in some detail (originally written for WebAuth v2), and I think that, with the weblogin help page, we can actually retire the old pages entirely and just replace them with the new pages. That will get rid of a point of old confusion and then I can grab the webauth.stanford.edu virtual host for the new pages.

I also did a lot of cleanup of the pages, removed some old irrelevant entries, and pointed to the new Mailman lists and archives.

Assuming that my proposal is approved, I'll probably move the pages tomorrow or early next week and then expand the FAQ a bit more for some of the more recent questions. I already have a few changes queued for WebAuth 3.4.3, although I need to do a fair bit of work on the weblogin script to handle the (now more complex) SPNEGO requirements.