Message history over IRCv3

[Scrxtchy]

It would be helpful to handle message history, which is supported by a small handful of clients keeping up to date with IRCv3.
It's still under development (might be a bit stalled), but there's a current standard that could be followed. since a few clients already follow it, and inspircd have implemented it into their deamon as well.

http://ircv3.net/specs/extensions/batch/chathistory-3.3.html
Here's a simple format for messages.
I would assume that when a user connects to the irc server, and joins a channel, the previous X messages could be fetched and sent over to the client