code: func (conn *Conn) h_671(line *Line) {
  	if !line.argslen(1) {
  		return
  	}
  	if nk := conn.st.GetNick(line.Args[1]); nk != nil {
  		conn.st.NickModes(nk.Nick, "+z")
  	} else {
  		logging.Warn("irc.671(): received WHOIS SSL info for unknown nick %s",
  			line.Args[1])
  	}
  }
docs: // Handle 671 whois reply (nick connected via SSL)