Added spawn origin flags.

- Added new spawn flags that allow for checking if an actor was spawned by the level, the console, or ACS/DECORATE/ZScript.

src/d_net.cpp

@@ -2423,6 +2423,7 @@ void Net_DoCommand (int type, uint8_t **stream, int player)
 						AActor *spawned = Spawn (primaryLevel, typeinfo, spawnpos, ALLOW_REPLACE);
 						if (spawned != NULL)
 						{
+							spawned->SpawnFlags |= MTF_CONSOLETHING;
 							if (type == DEM_SUMMONFRIEND || type == DEM_SUMMONFRIEND2 || type == DEM_SUMMONMBF)
 							{
 								if (spawned->CountsAsKill()) 

src/doomdata.h

@@ -424,6 +424,11 @@ enum EMapThingFlags
 	MTF_NOINFIGHTING	= 0x100000,
 	MTF_NOCOUNT			= 0x200000,	// Removes COUNTKILL/COUNTITEM
 
+	// Thing spawn origins, what created this thing?
+	MTF_MAPTHING		= 0x400000, // Map spawned
+	MTF_CONSOLETHING	= 0x800000, // Console spawned (i.e summon)
+	MTF_NONSPAWNTHING	= (MTF_MAPTHING|MTF_CONSOLETHING), // [inkoalawetrust]: Rachael didn't want a dedicated MTF_SPAWNTHING flag taking up the field, so check if the other 2 flags aren't true instead.
+
 	// BOOM and DOOM compatible versions of some of the above
 
 	BTF_NOTSINGLE		= 0x0010,	// (TF_COOPERATIVE|TF_DEATHMATCH)

src/playsim/p_mobj.cpp

@@ -5352,6 +5352,7 @@ void AActor::LevelSpawned ()
 	{
 		flags &= ~MF_DROPPED;
 	}
+	SpawnFlags |= MTF_MAPTHING;
 	HandleSpawnFlags ();
 }
 

wadsrc/static/zscript/constants.zs

@@ -1008,6 +1008,11 @@ enum EMapThingFlags
 	MTF_SECRET			= 0x080000,	// Secret pickup
 	MTF_NOINFIGHTING	= 0x100000,
 	MTF_NOCOUNT			= 0x200000,	// Removes COUNTKILL/COUNTITEM
+
+	// Thing spawn origins, what created this thing?
+	MTF_MAPTHING		= 0x400000, // Map spawned
+	MTF_CONSOLETHING	= 0x800000, // Console spawned (i.e summon)
+	MTF_NONSPAWNTHING	= (MTF_MAPTHING|MTF_CONSOLETHING), // [inkoalawetrust]: Rachael didn't want a dedicated MTF_SPAWNTHING flag taking up the field, so check if the other 2 flags aren't true instead.
 };
 
 enum ESkillProperty