This allows people to watch replays without the characters loaded,
without making everyone be Sonic.

Because IPv6 doesn't seem to work anyway.

This makes for smaller replay files while keeping
sync checks in place!

This caused a lot of """desyncs""" when players were moving
between 128-255 FU/T, which was exacerbated by this next commit...

Begins the process of namespacing demo recording commands.

This patches over a few trouble spots, like Misty Maze, causing
consistent resyncs and screwing up playback.

Notably over chat.

Music pausing is now optional.
Sounds may be paused--on by default.
The game itself being paused in off-line mode is now optional.

(showfocuslost now loads from config.)

Fix what was discussed, minus the rocksneaker math which is still shady, but let's not break what currently works

As a result, majormods trips for Lua and map replacements now, but modifiedgame isn't set for minor addons...

Should this just be moved into d_net.h instead of defining it here and in d_net.c?