UseMultiplayerMonsters property for skill MAPINFO

[[HotPocket]]

Since I couldn't fit it full into the title, just pretend it says "UseMultiplayerMonsters property for skill definition in MAPINFO"

Pretty much the title, adding said property to a skill definition in a MAPINFO text lump would spawn all monsters where they would be as if it were a co-op match.
And maybe to expand on the idea a little, possibly add UseSingleplayerMonsters, DonotUseSingleplayerMonsters, and DonotUseMultiplayerMonsters