Make bots first-class players.

- Bots have their own Clients, with unique ClientIDs
 - Hosts can set bot team/color in the lobby
 - Bots are kicked when switching to a smaller map without enough slots
 - Order validator assumes that only client 0 has permission to issue bot orders

OpenRA.Mods.RA/CreateMPPlayers.cs

@@ -34,13 +34,13 @@ namespace OpenRA.Mods.RA
 			foreach (var kv in w.LobbyInfo.Slots)
 			{
 				var client = w.LobbyInfo.ClientInSlot(kv.Key);
-				if (client == null && kv.Value.Bot == null)
+				if (client == null)
 					continue;
 
 				var player = new Player(w, client, kv.Value, w.Map.Players[kv.Value.PlayerReference]);
 				w.AddPlayer(player);
 
-				if (client != null && client.Index == Game.LocalClientId)
+				if (client.Index == Game.LocalClientId)
 					w.SetLocalPlayer(player.InternalName);
 			}