Disable all the interior entrances and exits in the game (the yellow arrows at doors).
This function will only work if it has been used BEFORE a player connects (it is recommended to use it in OnGameModeInit). It will not remove a connected player's markers.
If the gamemode is changed after this function has been used, and the new gamemode doesn't disable markers, the markers will NOT reappear for already-connected players (but will for newly connected players).
- AllowInteriorWeapons: Determine if weapons can be used in interiors.