znc/znc — pull request #750 by jpnurmi (2014-11-13 23:33:03+00:00)
Title: Introduce a module that provides client specific buffer playback

The module supports only IRC clients with server-time support.
`AutoClearChanBuffer` and `AutoClearQueryBuffer` must be turned off.

Client identifiers must be registered:

/msg *clientbuffer addclient identifier

Connect ZNC with `user@identifier/network:pass` and the client will
receive only playback messages that it hasn't been already sent.