Dedicated Server Querying and Session Authentication (#1690) * Authentication and encryption can now be enabled (by default) * Session authentication is added for authentication tickets - this is what makes the player count go up on a server or down when they leave * Dedicated servers use a Fake IP and can be connected to either by their Fake IP or by their associated Steam Id * Dedicated servers can be queried from the master server using the GameSocketShare mode and so can now be fetched in-game for displaying in some UI later (Steam Server Browser does not display them due to using Fake IP) * Added Rich Presence support for players who are connected to a dedicated server (and other players can join the game) * Fixed some issues with headless mode such as when things were attempting to use ISteamFriends or some texture methods * Stale connections are properly disposed of and cleaned up within a network system where in some cases before they were not * Ensure that we disconnect from the network system when closing the game/app, this makes sure that the Steam Game Server is properly shut down * Fixed / implemented Steam Game Server callbacks * Moved Steam Network Sockets configuration to C# and set them in the right place now * Ensure that we disallow a player to connect to a dedicated server if there are no player slots remaining