func (srv *Server) newConn(rwc net.Conn) *conn {
	c := &conn{
		server: srv,
		rwc:    rwc,
	}
	if debugServerConnections {
		c.rwc = newLoggingConn("server", c.rwc)
	}
	return c
}

type readResult struct {
	_   incomparable
	n   int
	err error
	b   byte // byte read, if n == 1
}

// connReader is the io.Reader wrapper used by *conn. It combines a