Another change to the schema redirects

[Cantor, Scott]

As I have "blogged", we are working to evaluate Codeberg as a replacement for mastering our source code ourselves.

As part of this effort, since the goal eventually is to take down our hosted GitWeb in favor of Codeberg, I've made a change to the rewrite rules that handle requests for the IdP and OIDC configuration schemas.

Formerly those were internally proxied to GitWeb, but they are for the moment issuing client side redirects to Codeberg's copy.

The reason we would do this is that if we proxy them like we have, all the traffic would appear to Codeberg as coming from us, and that could lead to throttling (we get a lot of requests for the schemas), which isn't acceptable.

My concern is this may break editors and workflows that can't handle redirects, and I don't know what our plan B is but for now, I just want to note it and ask anybody having issues to report that (but you should at least try and fix the issue locally, I assume some tools can follow them if told to).

If it mostly works, we'll almost certainly leave it this way for now.

-- Scott