[reBane]

Update to 21w52a:
- Removed NOTARGETing as that broke more things than it was worth
- Player VS AI flags for buildings, players, zombies and bosses
These are split into 4 cvars, allowing fine control. The "buildings vs"-flags are a bit wonky due to find target
- Added Detours for basic boss attacks (Headless Hatman, Merasmus, Monoculus)
- Detour FoundTarget call for sentries to prevent attacking players, bosses and buildings
This is a bit buggy as the turret is still set into a non-searching state, but i couldn't find a better way for non players/bots.
- Fixed Sentries targeting other buildings incorrectly
- Prevent buildings being damaged out of pvp