Core: Added trait 'SurrenderOnDisconnect' and the core changes required to make this work

OpenRA.Mods.RA/Player/SurrenderOnDisconnect.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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. For more information,
+ * see LICENSE.
+ */
+#endregion
+
+using OpenRA.Network;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class SurrenderOnDisconnectInfo : TraitInfo<SurrenderOnDisconnect>
+	{
+
+	}
+
+	class SurrenderOnDisconnect : ITick
+	{
+		private bool Disconnected = false;
+
+		public void Tick(Actor self)
+		{
+			if (Disconnected) return;
+
+			var p = self.Owner;
+
+			if (p.WinState == WinState.Lost || p.WinState == WinState.Won) return; /* already won or lost */
+
+			var client = p.World.LobbyInfo.ClientWithIndex(p.ClientIndex);
+			if (client == null)
+				return;
+
+			if (client.State == Session.ClientState.Disconnected)
+			{
+				Disconnected = true; /* dont call this multiple times! */
+				self.World.IssueOrder(new Order("Surrender", self));
+			}
+		}
+	}
+}