"GOPRIVATE=",
		"GOROOT=" + testGOROOT,
		"GOTRACEBACK=system",
		"TESTGONETWORK=panic", // allow only local connections by default; the [net] condition resets this
		"TESTGO_GOROOT=" + testGOROOT,
		"TESTGO_EXE=" + testGo,
		"TESTGO_VCSTEST_HOST=" + httpURL.Host,
		"TESTGO_VCSTEST_TLS_HOST=" + httpsURL.Host,
		"TESTGO_VCSTEST_CERT=" + srvCertFile,
		"TESTGONETWORK=panic", // cleared by the [net] condition
		"GOSUMDB=" + testSumDBVerifierKey,

			t.Cleanup(func() {
				<-netTestSem
				scriptNetEnabled.Delete(t)
			})
		}
	}

	// Since we have confirmed that the network is available,
	// allow cmd/go to use it.
	s.Setenv("TESTGONETWORK", "")
	return true, nil
}

func hasGodebug(s *script.State, value string) (bool, error) {
	godebug, _ := s.LookupEnv("GODEBUG")
	for _, p := range strings.Split(godebug, ",") {

				}
				return res, nil
			}

		case "localhost.localdev":
			return nil, fmt.Errorf("no such host localhost.localdev")

		default:
			if os.Getenv("TESTGONETWORK") == "panic" {
				if _, ok := interceptURL(url); !ok {
					host := url.Host
					if h, _, err := net.SplitHostPort(url.Host); err == nil && h != "" {
						host = h
					}
					addr := net.ParseIP(host)

}

// unsetenv removes an environment variable.
func (tg *testgoData) unsetenv(name string) {
	if tg.env == nil {
		tg.env = append([]string(nil), os.Environ()...)
		tg.env = append(tg.env, "GO111MODULE=off", "TESTGONETWORK=panic")
		if testing.Short() {
			tg.env = append(tg.env, "TESTGOVCS=panic")
		}
	}
	for i, v := range tg.env {
		if strings.HasPrefix(v, name+"=") {
			tg.env = append(tg.env[:i], tg.env[i+1:]...)