Expose Hello‑Retry‑Request flag in TLS ConnectionState

// This program demonstrates the new HelloRetryRequest field in
// crypto/tls.ConnectionState and crypto/tls.ClientHelloInfo.
// The field is available in Go 1.27.1, so we can create a dummy
// ConnectionState value and inspect it. No network activity is
// performed, keeping the program fast and self‑contained.

package main

import (
	"crypto/tls"
	"fmt"
)

func main() {
	// Construct a ConnectionState with HelloRetryRequest set to true.
	// In a real TLS handshake this value would be set by the
	// crypto/tls package to indicate that an HRR was performed.
	cs := tls.ConnectionState{
		HelloRetryRequest: true,
	}

	// Construct a ClientHelloInfo with HelloRetryRequest set to true.
	// This would be set when the client sends a ClientHello in
	// response to a server's Hello Retry Request.
	ch := tls.ClientHelloInfo{
		HelloRetryRequest: true,
	}

	// Print the values to show that the fields exist and can be read.
	fmt.Printf("ConnectionState.HelloRetryRequest: %v\n", cs.HelloRetryRequest)
	fmt.Printf("ClientHelloInfo.HelloRetryRequest: %v\n", ch.HelloRetryRequest)
}