}
	}
}

// closeConn closes c.
// s.mu must be held.
func (s *Server) closeConn(c net.Conn) { s.closeConnChan(c, nil) }

// closeConnChan is like closeConn, but takes an optional channel to receive a value
// when the goroutine closing c is done.
func (s *Server) closeConnChan(c net.Conn, done chan<- struct{}) {
	c.Close()
	if done != nil {
		done <- struct{}{}
	}