Shouldn't pass scheme prefixed localhost proxy environment variables.

[lingsamuel]

minikube/pkg/minikube/proxy/proxy.go

Lines 156 to 170 in 32bf4d4

	func SetDockerEnv() []string {
	for _, k := range EnvVars {
	if v := os.Getenv(k); v != "" {
	// convert https_proxy to HTTPS_PROXY for linux
	// TODO (@medyagh): if user has both http_proxy & HTTPS_PROXY set merge them.
	k = strings.ToUpper(k)
	if k == "HTTP_PROXY" || k == "HTTPS_PROXY" {
	if strings.HasPrefix(v, "localhost") || strings.HasPrefix(v, "127.0") {
	out.WarningT("Not passing {{.name}}={{.value}} to docker env.", out.V{"name": k, "value": v})
	continue
	}
	}
	config.DockerEnv = append(config.DockerEnv, fmt.Sprintf("%s=%s", k, v))
	}
	}

strings.HasPrefix(v, "localhost") || strings.HasPrefix(v, "127.0")

Proxy environment variables can start with scheme like http://.

/kind feature