[grizzly] Expose start argument while providing parentContext

[Menecats]

Exposes the start argument in the createHttpServer method to allow creating a non-started server.

This is necessary when wanting to register additional addons on the server listener before starting it.

Example:

[...]

final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(uri, resource, serviceLocator, false);

final WebSocketAddOn addon = new WebSocketAddOn();
server.getListeners().forEach(l -> l.registerAddOn(addon));

WebSocketEngine.getEngine().register(contextPath, "/ws", wsManager);

[...]

[jansupol]

@Menecats Please update the copyright year to 2022 in the file.

Can you please also change @since 3.1 to 2.37 (master branch)?