IRCv3 server-time support

[Mikaela]

• IRCv3.2 server-time Extension

When the client supports server-time and it's enabled, the IRC server includes timestamps when it received messages which clients should then show instead of their own timestamps.

I think Matrix behaves by just showing the first instance of the message received in the room and then distributing it to other participating homeservers with the same timestamps, so I think it could be said that Matrix is also using server-time on the Matrix side. I think using server-time, when available, would decrease how complex mapping messages across would be, but I am not a coder/developer and thus I am unsure.

The specification linked in the beginning also says:

Servers offering this capability for all messages SHOULD also offer the echo-message capability to allow clients to keep a consistent chronology of events.

but I think it's not possible to do with Matrix and at the time of writing WeeChat (native IRC client) doesn't support echo-message either while supporting server-time.

[Half-Shot]

This needs a spec, as showing a user-defined timestamp on Matrix is not supported.