mod_http_oauth2: Validate (unused at this point) localized URIs Client registration may include keys of the form "some_uri#lang-code" pointing to alternate language versions of the various URIs. We don't use this yet but the same validation should apply.

This module discards typing notifications sent to a bare host JID,
preventing error replies to be sent. These errors are harmless but can
be annoying sometimes if your client shows them prominently.