Add a lobby option to disable Concrete in D2k.

mods/d2k/rules/defaults.yaml

@@ -410,6 +410,7 @@
 		TerrainTypes: Rock, Concrete
 		BuildSounds: BUILD1.WAV
 	D2kActorPreviewPlaceBuildingPreview:
+		RequiresPrerequisites: !global-auto-concrete
 		OverridePalette: placebuilding
 	RequiresBuildableArea:
 		AreaTypes: building
@@ -447,12 +448,20 @@
 		SellSounds: BUILD1.WAV
 	Guardable:
 		Range: 3c0
+	GrantConditionOnPrerequisite@AUTOCONCRETE:
+		Condition: auto-concrete
+		Prerequisites: global-auto-concrete
 	DamagedByTerrain:
+		RequiresCondition: !auto-concrete
 		Damage: 500
 		DamageInterval: 100
 		Terrain: Rock
 		DamageThreshold: 50
 		StartOnThreshold: true
+	LaysTerrain:
+		RequiresCondition: auto-concrete
+		TerrainTypes: Rock
+		Template: 88
 	ThrowsShrapnel:
 		Weapons: Debris, Debris2, Debris3, Debris4
 		Pieces: 2, 5

mods/d2k/rules/player.yaml

@@ -98,10 +98,17 @@ Player:
 		CashTickUpNotification: CashTickUp
 		CashTickDownNotification: CashTickDown
 	DeveloperMode:
-		CheckboxDisplayOrder: 7
+		CheckboxDisplayOrder: 8
 	BaseAttackNotifier:
 	Shroud:
 		FogCheckboxDisplayOrder: 3
+	LobbyPrerequisiteCheckbox@AUTOCONCRETE:
+		ID: autoconcrete
+		Label: Automatic Concrete
+		Description: Concrete foundations are automatically created beneath buildings
+		Enabled: False
+		DisplayOrder: 7
+		Prerequisites: global-auto-concrete
 	FrozenActorLayer:
 	HarvesterAttackNotifier:
 	PlayerStatistics:

mods/d2k/rules/structures.yaml

@@ -34,6 +34,7 @@ concretea:
 		Cost: 20
 	Buildable:
 		BuildPaletteOrder: 110
+		Prerequisites: ~!global-auto-concrete
 		BuildDuration: 62
 		BuildDurationModifier: 100
 
@@ -48,7 +49,7 @@ concreteb:
 		Cost: 50
 	Buildable:
 		BuildPaletteOrder: 210
-		Prerequisites: upgrade.conyard
+		Prerequisites: upgrade.conyard, ~!global-auto-concrete
 		BuildDuration: 94
 		BuildDurationModifier: 100
 
@@ -64,8 +65,7 @@ construction_yard:
 		Dimensions: 3,3
 		LocalCenterOffset: 0,-512,0
 	LaysTerrain:
-		TerrainTypes: Rock
-		Template: 88
+		-RequiresCondition:
 	WithBuildingBib:
 	Selectable:
 		Bounds: 96,64