Merge pull request #4364 from ihptru/freshing-maps

re-InitializeLoaders on Dedicated server restart, will fresh list of maps too

OpenRA.Game/Game.cs

@@ -385,6 +385,7 @@ namespace OpenRA
 					if (Settings.Server.DedicatedLoop)
 					{
 						Console.WriteLine("Starting a new server instance...");
+						modData.InitializeLoaders();
 						continue;
 					}
 

OpenRA.Mods.RA/ServerTraits/LobbyCommands.cs

@@ -263,7 +263,7 @@ namespace OpenRA.Mods.RA.Server
 
 						if (!server.ModData.AvailableMaps.ContainsKey(s))
 						{
-							server.SendOrderTo(conn, "Message", "Map not found");
+							server.SendOrderTo(conn, "Message", "Map was not found on server");
 							return true;
 						}
 						server.LobbyInfo.GlobalSettings.Map = s;