Add vote kick

(cherry picked from commit 144e716cdf)

OpenRA.Game/Network/UnitOrders.cs

@@ -20,11 +20,15 @@ namespace OpenRA.Network
 	{
 		public const int ChatMessageMaxLength = 2500;
 
+		public static int? KickVoteTarget { get; internal set; }
+
 		static Player FindPlayerByClient(this World world, Session.Client c)
 		{
 			return world.Players.FirstOrDefault(p => p.ClientIndex == c.Index && p.PlayerReference.Playable);
 		}
 
+		static bool OrderNotFromServerOrWorldIsReplay(int clientId, World world) => clientId != 0 || (world != null && world.IsReplay);
+
 		internal static void ProcessOrder(OrderManager orderManager, World world, int clientId, Order order)
 		{
 			switch (order.OrderString)
@@ -52,9 +56,7 @@ namespace OpenRA.Network
 
 				case "DisableChatEntry":
 					{
-						// Order must originate from the server
-						// Don't disable chat in replays
-						if (clientId != 0 || (world != null && world.IsReplay))
+						if (OrderNotFromServerOrWorldIsReplay(clientId, world))
 							break;
 
 						// Server may send MaxValue to indicate that it is disabled until further notice
@@ -66,6 +68,26 @@ namespace OpenRA.Network
 						break;
 					}
 
+				case "StartKickVote":
+					{
+						if (OrderNotFromServerOrWorldIsReplay(clientId, world))
+							break;
+
+						KickVoteTarget = (int)order.ExtraData;
+						break;
+					}
+
+				case "EndKickVote":
+					{
+						if (OrderNotFromServerOrWorldIsReplay(clientId, world))
+							break;
+
+						if (KickVoteTarget == (int)order.ExtraData)
+							KickVoteTarget = null;
+
+						break;
+					}
+
 				case "Chat":
 					{
 						var client = orderManager.LobbyInfo.ClientWithIndex(clientId);
@@ -365,5 +387,10 @@ namespace OpenRA.Network
 			if (world.OrderValidators.All(vo => vo.OrderValidation(orderManager, world, clientId, order)))
 				order.Subject.ResolveOrder(order);
 		}
+
+		public static void Clear()
+		{
+			KickVoteTarget = null;
+		}
 	}
 }