this field is both mistyped and misnamed; it's not a stockpile_group_set and is called specflag in toady code
the field encodes multiple overlapping bits depending on job type:
- bit0:
ConstructBuildingSwitchedSpot, CleanPatientTriedSoap, CleanSelfTriedSoap, PlaceTrackVehicleClearedJobs, GatherFromZone, DrinkItemLookedForNearbyGoblet, InterrogationDidOfficeAttempt
- bit1:
GatherPickTrees
- bit2:
GatherPickShrubs
- bit3:
GatherGatherFallen
- bit4:
GatherNoLadderSearch
- bit5:
GatherLadderRestricted
- bit6:
GatherLadderGround
however there are multiple references in code to this field so renaming it requires coordination