x/net/http2: deprecate Transport and Server

// This program shows that HTTP/2 can be used with the standard net/http
// package without importing x/net/http2. It starts a local HTTPS server
// that automatically serves HTTP/2, then makes a request to it using a
// net/http Transport configured for TLS. The output confirms the
// request succeeded and the server responded with status 200.
package main

import (
	"crypto/tls"
	"fmt"
	"net/http"
	"net/http/httptest"
)

func main() {
	// Create a test HTTPS server that serves HTTP/2 automatically.
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "Hello, HTTP/2!")
	}))
	defer server.Close()

	// Configure a client Transport that uses TLS with the server's cert.
	transport := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	}
	client := &http.Client{Transport: transport}

	// Make a request to the test server.
	resp, err := client.Get(server.URL)
	if err != nil {
		fmt.Println("request error:", err)
		return
	}
	defer resp.Body.Close()

	// Print the status code to show the request succeeded.
	fmt.Println("Response status:", resp.Status)
}