Move map configuration to rules.

OpenRA.Mods.Common/Traits/Player/ProvidesTechPrerequisite.cs

@@ -40,8 +40,7 @@ namespace OpenRA.Mods.Common.Traits
 		public ProvidesTechPrerequisite(ProvidesTechPrerequisiteInfo info, ActorInitializer init)
 		{
 			this.info = info;
-			var tech = init.World.Map.Options.TechLevel ?? init.World.LobbyInfo.GlobalSettings.TechLevel;
-			enabled = info.Name == tech;
+			enabled = info.Name == init.World.LobbyInfo.GlobalSettings.TechLevel;
 		}
 	}
 }

OpenRA.Mods.Common/Traits/World/MapOptions.cs

@@ -0,0 +1,43 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2016 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Controls the map difficulty, tech level, and short game lobby options.")]
+	public class MapOptionsInfo : TraitInfo<MapOptions>
+	{
+		[Desc("Default value of the short game checkbox in the lobby.")]
+		public readonly bool ShortGameEnabled = true;
+
+		[Desc("Prevent the short game enabled state from being changed in the lobby.")]
+		public readonly bool ShortGameLocked = false;
+
+		[Desc("Default tech level.")]
+		public readonly string TechLevel = "Unrestricted";
+
+		[Desc("Prevent the tech level from being changed in the lobby.")]
+		public readonly bool TechLevelLocked = false;
+
+		[Desc("Difficulty levels supported by the map.")]
+		public readonly string[] Difficulties = { };
+
+		[Desc("Default difficulty level.")]
+		public readonly string Difficulty = null;
+
+		[Desc("Prevent the difficulty from being changed in the lobby.")]
+		public readonly bool DifficultyLocked = false;
+	}
+
+	public class MapOptions { }
+}