- Add additional can_atmos_pass value ATMOS_PASS_PROC which indicates custom behavior requiring calling the CanZASPass proc.
- The benefit being for the other three values we DON'T need to call CanZASPass at all! We already know the behavior without the overhead of a proc call.
- Obviously any atom with can_atmos_pass = ATMOS_PASS_PROC cannot now call ..() in CanZASPass() since the default behavior would be to (recursively) call CanZASPass()
- This required re-numbering the constants, so I also fixed all code that assumed particular values for the constants.
- Switched all types which overrode CanZASPass with custom logic to be can_atmos_pass = ATMOS_PASS_PROC
- Changed /turf/c_airblock() to skip calling /atom/movable/c_airblock() for the three can_atmos_pass values that don't require calling the proc.
* Port of the "Airflow" portions of Yonaguni/EuropaStation#618
* The "airflow" part of ZAS used to be handled by a sleep'd loop. This has the potential to bunch up and lag. Switching to a StonedMC managed subsystem improves it.
* Fixed to ensure that zshadow mobs cannot be blown around by the wind no matter how fierce.
* Added a message to mobs informing them when their boots save them from being wind-thwapped.
* Check w_class on non-item objects if they have it defined (might as well since var/w_class is on /obj)
* Tiny optimization of c_airblock
