minimal changes for compatibility with lua 5.2, thanks to v4hn for fixing standard library loads. note: ALSO compatibile with (internal) lua 5.1, until something bothers to upgrade bundled lua version
- Fix bug with infinite rounds in racer when a team quits mid-game
- Don't allow placing waypoint right on top of previous one, prevents accidental double waypoints
- Don't limit maps on number of embedded waypoints