Loop forwarding bug

[Joriz]

I found a little loop bug in the forwarding system.

If someone makes a subdomain for example test.lyp.nl and he points it to test.lyp.nl/home.html the system starts to open a frame in a frame in a frame ...
This is because of the .htaccess file and also because it is allowed to point a subdomain to the same url.

I think this is important to fix because someone could create a small attack on the server with this bug.