Can optionally pass LobbyConfig to CreateLobby. Right now only contains LobbyPrivacy. Add LobbyPrivacy.FriendsOnly.
Separate overload as not to mess with any existing game packages
Make old CreateLobby method obsolete. Add LobbyConfig.MaxPlayers (defaults to package config.) Add LobbyConfig.Name (defaults to hostname for Dedicated Servers, or the owner's Steam Name for P2P)