Add Redirect an Entire Site without Links section

[maidmaid]

Hello!

We have redirection for
www.oldsite.com/some/crazy/link.html => www.newsite.com/some/crazy/link.html
but not for
www.oldsite.com/some/crazy/link.html => www.newsite.com/.

This PR adds this.

[rbowen]

Using ^(.*)$ when you're not going to use the backreference is not recommended practice. Either just use ^ for the shortest-possible match, or just use the Redirect directive. The most important part about mod_rewrite is knowing when not to use it.

[Wouter0100]

Maybe better to use another naming for this, not "link" as it isn't really clear. Something like "path"?