This let's us populate the `from_real_jid` attribute for messages in
cases where the user's nickname has changed.
Only save the occupant-id if the MUC supports it
Store all advertised features on the `chatbox.features` model.
This allows us to look up a feature without using the async
`disco.supports` API.
Updates #2241
even if the global configuration is to disallow it.
* When parsing, include all media URLs, not just the ones from allowed domains.
That makes it possible to change allowed domains on-the-fly,
while still allowing media in individual messages to be shown manually
(via the message actions dropdown).
* Merge `embed_audio`, `embed_video` and `show_images_inline` into `render_media`
* Create new config settings for allowable domains for images, video and audio
* Check the URL domain against a whitelist for the message actions dropdown
Add caps element to the MUC join presence, so that the MUC MEP node can
know whether we're interested in receiving MEP messages.
Create info messages for any `conference-info` tags that contain `activity` tags.
Check for both `headline` and `normal` MEP messages (even though the XEP
only show `headline` examples), since `normal` messages can be archived
in MAM, but `headline` ones not.
Update the XEP-0372 reference-parsing code to take the `anchor`
attribute into consideration, specifically to check which text element
the reference applies to.
Add support for rendering XEP-0372 mentions in "info" messages and for
triggering HTML5 Desktop notifications for such mentions.
Background:
-----------
XEP-0316 describes a way for a MUC to send out PEP-like messages to MUC
participants. This feature can be used to describe custom activity happening
in the MUC.
