Add a mechanism for custom drop messages. Implement for kick.

OpenRA.Game/Network/OrderManager.cs

@@ -27,6 +27,7 @@ namespace OpenRA.Network
 
 		public readonly string Host;
 		public readonly int Port;
+		public string ServerError;
 
 		public int NetFrameNumber { get; private set; }
 		public int LocalFrameNumber;

OpenRA.Game/Network/UnitOrders.cs

@@ -38,7 +38,7 @@ namespace OpenRA.Network
 
 			switch (order.OrderString)
 			{
-			case "Chat":
+				case "Chat":
 					{
 						var client = orderManager.LobbyInfo.ClientWithIndex(clientId);
 						if (client != null)
@@ -128,7 +128,9 @@ namespace OpenRA.Network
 					orderManager.IssueOrder(Order.HandshakeResponse(response.Serialize()));
 					break;
 				}
-				
+				case "ServerError":
+					orderManager.ServerError = order.TargetString;
+				break;
 				case "SyncInfo":
 					{
 						orderManager.LobbyInfo = Session.Deserialize(order.TargetString);

OpenRA.Game/Server/Server.cs

@@ -310,10 +310,15 @@ namespace OpenRA.Server
 		
 		public void SendChatTo(Connection conn, string text)
 		{
-			DispatchOrdersToClient(conn, 0, 0,
-				new ServerOrder("Chat", text).Serialize());
+			SendOrderTo(conn, "Chat", text);
 		}
 
+		public void SendOrderTo(Connection conn, string order, string data)
+		{
+			DispatchOrdersToClient(conn, 0, 0,
+				new ServerOrder(order, data).Serialize());
+		}
+		
         public void SendChat(Connection asConn, string text)
         {
             DispatchOrders(asConn, 0, new ServerOrder("Chat", text).Serialize());