Fix server not stopping when eula not agreed yet

Spigot-Server-Patches/Improve-Server-Thread-Pool-and-Thread-Priorities.patch

@@ -40,6 +40,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        super(target, "Server-Worker-" + threadId.getAndIncrement());
 +        setPriority(Thread.NORM_PRIORITY-1); // Deprioritize over main
 +        this.setUncaughtExceptionHandler((thread, throwable) -> {
++            thread.setDaemon(true);
 +            if (throwable instanceof CompletionException) {
 +                throwable = throwable.getCause();
 +            }