Whew, lost the website for a few days there. Not sure what I had done, but mis-configured something and lost the ability to get into the site.
Had to go in through the backdoor (FTP and MySql administrator) to manually delete some things I had done just before the problem happened.
Luckily, that worked, and I was able to get back in to the site and admin pages. Fixed things up to where they were before, and hopefully I won’t do that again. But if I did, I will know how to at least resuscitate the site.