Clean trailing characters like . from host

It was noticed in https://gitlab.com/gitlab-org/gitlab-pages/-/issues/690#note_963805488 that there are certain requests with trailing . which causes a failure in exact domain host name matching while querying the gitlab api.

We should redirect request with trailing . after stripping them of ..

Note: Trailing . in domains have special significance . But it looks like it wouldn't affect us in this case.

Update

• Since trailing . in domains have special significance, if we strip . in the domain and redirect, a suffix would get added through the DNS resolution at the client side
• E.g. the client has a DNS suffix configured(suffix.). When they type xyz.test, it gets resolved to xyz.test.suffix.. Thus, if we redirect, xyz.test. to xyz.test, the client would resolve it to xyz.test.suffix.. And it could lead to a redirection loop as well.
• Keeping the above in mind, we should rewrite the request in place and just strip off the trailing . by adding a middleware which would normalize the host name of the request.