Hal Heisler sig9

Nginx TLS SNI routing, based on subdomain pattern

Nginx can be configured to route to a backend, based on the server's domain name, which is included in the SSL/TLS handshake (Server Name Indication, SNI).
This works for http upstream servers, but also for other protocols, that can be secured with TLS.

prerequisites

at least nginx 1.15.9 to use variables in ssl_certificate and ssl_certificate_key.
check nginx -V for the following:
```
...
TLS SNI support enabled
```

	#include "liburing.h"
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <unistd.h>

	#define QUEUE_DEPTH 32
	#define READ_SZ 4096

	@echo off
	setLocal enableDelayedExpansion
	:: === ADAPTING THIS TEMPLATE (for help, see bottom or invoke with "help") ===
	:: * Step 1 of 3: CLONE THIS BATCH FILE and give it a name of your choice.
	:: * Step 2 of 3: Set the TARGET LANGUAGE on the next line.
	:: One of: "ps1" "vbs" "js" (PowerShell, VBScript, JScript)
	:: OR: "all" (runs ALL embedded snippets, in sequence)
	:: NOTE: To add support for a new language, search for "NEW LANGUAGE"
	:: below and follow the instructions there.
	set "WRAPPER_LANG=ps1"