func send304(w ResponseWriter, r *Request) { w.WriteHeader(304) }

// Issue 15647: 204 responses can't have bodies, so HTTP/1.0 keep-alive conns should stay open.
func TestHTTP10KeepAlive204Response(t *testing.T) {
	testTCPConnectionStaysOpen(t, "GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n", HandlerFunc(send204))
}

func TestHTTP11KeepAlive204Response(t *testing.T) {