QUITs are often sent with an incorrect ChatBotId

[ipmb]

botbot-bot/dispatch/dispatch.go

Lines 55 to 64 in 61b5e64

	// Dispatch the line to several channels.
	// We need this for QUIT for example, which goes to all channels
	// that user was in.
	func (dis *Dispatcher) DispatchMany(l *line.Line, channels []string) {
	for _, chName := range channels {
	l.Channel = chName
	dis.Dispatch(l)
	}
	}

If the ChatBotId/Channel don't match the plugins won't be able to process the line.