mod_http_oauth2: Refactor client grant and response type checks Iterating over an array instead of creating a Set ought to create fewer short-lived tables. The arrays are usually very short so shouldn't be a performance issue. Moves validation earlier as to do less work before discovering that it can't proceed anyway.

---
labels:
- 'Stage-Alpha'
summary: Implements BOSH pre-bind
...

For why this can be useful, see
https://metajack.im/2009/12/14/fastest-xmpp-sessions-with-http-prebinding/

# To enable this module

Add `"http_prebind"` to `modules_enabled` on an anonymous virtual host.

This only works on anonymous ones for now.