Fixes as per comments. (+1 squashed commits)

Squashed commits:

[c3abf4b] Fixes as per comments. (+1 squashed commits)

Squashed commits:

[a289d17] Regression and UpgradeRules fix for #5921.

OpenRA.Utility/UpgradeRules.cs

@@ -316,6 +316,18 @@ namespace OpenRA.Utility
 					}
 				}
 
+				// GiveUnitCrateAction and GiveMcvCrateAction were updated to allow multiple units
+				if (engineVersion < 20140723)
+				{
+					if (depth == 2 && parentKey.Contains("GiveMcvCrateAction"))
+						if (node.Key == "Unit")
+							node.Key = "Units";
+
+					if (depth == 2 && parentKey.Contains("GiveUnitCrateAction"))
+						if (node.Key == "Unit")
+							node.Key = "Units";
+				}
+
 				UpgradeActorRules(engineVersion, ref node.Value.Nodes, node, depth + 1);
 			}
 		}

mods/cnc/rules/misc.yaml

@@ -17,10 +17,15 @@ CRATE:
 	CloakCrateAction:
 		SelectionShares: 5
 		Effect: cloak
+	DuplicateUnitCrateAction:
+		SelectionShares: 10
+		MaxAmount: 5
+		MinAmount: 1
+		MaxDuplicatesWorth: 1250
 	GiveMcvCrateAction:
 		SelectionShares: 0
 		NoBaseSelectionShares: 120
-		Unit: mcv
+		Units: mcv
 	RenderSprites:
 		Palette: effect
 	WithCrateBody: