2007/2/26, Paul Coghlan pcoghlan@usa.net:
Could you not rename index.php to index_old.php and put a new one up with some nice message and then revert after the upgrade?
This sounds like a good idea. A redirect rule sounds too troublesome to me.
Actually, I raised this question because I though MediaWiki had some "out-of-service mode" like other server software do. In some of them, the presence of a file or a configuration option make the software just output a message saying that it is in maintenance.