code: func (conn *Conn) h_CTCP(line *Line) {
  	if line.Args[0] == VERSION {
  		conn.CtcpReply(line.Nick, VERSION, conn.cfg.Version)
  	} else if line.Args[0] == PING && line.argslen(2) {
  		conn.CtcpReply(line.Nick, PING, line.Args[2])
  	}
  }
docs: // Handle VERSION requests and CTCP PING