// Issue 30710: ensure that as per the spec, a server responds
// with 501 Not Implemented for unsupported transfer-encodings.
func TestUnsupportedTransferEncodingsReturn501(t *testing.T) {
	run(t, testUnsupportedTransferEncodingsReturn501, []testMode{http1Mode})
}
func testUnsupportedTransferEncodingsReturn501(t *testing.T, mode testMode) {
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {