Feature request: ability remove specific messages from chat

[ian-kelling]

/clear is useful for removing offensive messages from chat, but it
would be nice for operators to have the ability to remove specific
messages as the rest would be useful.

[jech]

Right. That will require a protocol change (we'll need to add a unique id to all chat messages), so it's not going to happen in the 0.8 branch, and perhaps not in 0.9 (which is pretty much in feature-freeze).

[jech]

Implemented in the branch protocol-tweaks. I'll merge it into master when I've checked it carefully.

[jech]

Done in 123d51e.