Allow multiple games per server

[roncli]

This will require support from olmod to send the server stats to include a game ID so that the tracker can tell the games apart.

[tobiasksu]

Add port = Server.GetListenPort() to TrackerPostStats() calls

[roncli]

@tobiasksu Does this look right to you?

        public static void TrackerPostStats(JObject body)
        {
            body.Add("port", Server.GetListenPort());
            TrackerPost("/api/stats", body);
        }