mod_http_oauth2: Fire authentication events on login form
For e.g. mod_audit_auth to use.
A bit hacky because upon review many modules don't seem to handle the
lack of an XMPP session in the event payload.
# Strip XHTML-IM from messages received from strangers
::user/spam_check_message_custom
STRIP=html http://jabber.org/protocol/xhtml-im