Rewrote netcode to be more stable and functional. Packet-server mode has been restrategized and will now be the default netmode when playing with 3+ non-LAN players. TryRunTics has been cleaned up with older tick control behavior removed to account for the rewritten renderer. The main thread is now more consistent when playing online to prevent potential slow downs and lock ups. Load barriers are better accounted for to prevent spikes on level transition. Improvements to chat and lobby systems including a force start game button. Added a suite of new host options such as kicking and controlling who can pause the game. Max players increased from 8 to 16 since the new code can now handle it.
Note: Demo functionality is untested. This will be rewritten at a later time alongside improvements to GZDoom's playback features (e.g. freecam mode).
Unique RNG namespace for client-side effects and HUDs. Identifiers for these cannot clash with identifiers that affect the playsim making them completely safe to use in HUD elements. They also won't be saved.
These were creating dangerous interdependencies. It is better to do explicit conversions when needed.
As an added plus, this means that zstring.h no longer depends on name.h which was very annoying.
