I've added a HTTP webhook -> MUC gateway.
Also added a section in the bottom, that may be published on a different page, about discussions/drafts about bridging, not actual implementations.
Probably not within the scope of this FAQ, but this looks interesting for creating a proper xmpp-matrix gateway: https://github.com/tulir/mautrix-python together wth one of the good Python xmpp libraries.
It should work with the Conduit.rs Matrix homeserver, which seems a good leightweight and easy to host option of you are only interested in bridging.
Deleting a branch is permanent. It CANNOT be undone. Continue?