If you'd like for your server to be displayed in the server browser then you need to install this Plugin with the new 0.9.0 version of XLMultiplayer. This will allow you to access the SXLservers.com API which is linked up with the server browser.
Simply unzip and drop the folder inside the Plugins directory of your server. That's it!
Just simple server information and IP. If you are hosting a server locally, this will expose your external IP address, which is kind of obvious. It's recommended you only host Public servers on Remote servers!