Add Semi-Anonymous Rooms (SPEC-260)

[matrixbot]

Semi-Anonymous Room - A room in which an occupant's full ID can be discovered by room admins only. In such room occupant may choose an ID which does not expose his "usual"/full ID by which he is identified outside the context of a room.
(An adaptation of XEP-045::SARs)

Allows for more privacy / identity management.

(Imported from https://matrix.org/jira/browse/SPEC-260)

(Reported by wldhx (Dmitriy Volkov))

[0cwa]

This seems a lot like rocketchat's anonymous (pseudonymous) mode they proposed here: RocketChat/Rocket.Chat#604
and the eventual implementation here: RocketChat/Rocket.Chat#6797 🙂

[ara4n]

We will probably get this automatically when MSC1228 lands.

[rriemann]

So useful in many contexts … and to achieve better data protection compliance!