mod_vcard_muc: Add an alternative method of signaling avatar change When the avatar has been changed, a signal is sent that the room configuration has changed. Clients then do a disco#info query to find the SHA-1 of the new avatar. They can then fetch it as before, or not if they have it cached already. This is meant to be less disruptive than signaling via presence, which caused problems for some clients. If clients transition to the new method, the old one can eventually be removed. The namespace is made up while waiting for standardization. Otherwise it is very close to what's described in https://xmpp.org/extensions/inbox/muc-avatars.html

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labels:
- 'Stage-Alpha'
summary: 'Implement XEP-xxxx: JID prep for clients'
...

Introduction
============

This is a plugin that implements the JID prep protocol defined in
<http://xmpp.org/extensions/inbox/jidprep.html>

Details
=======

JID prep requests can happen over XMPP using the protocol defined in the
document linked above, or alternatively over HTTP. Simply request:

    http://server:5280/jid_prep/USER@HOST

The result will be the stringprepped JID, or a 400 Bad Request if the
given JID is invalid.

Compatibility
=============

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  0.9   Works
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