Lobby Config / Friends Only Lobbies (#1696) * 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) * Fix lobby config max players