Stop server crashing if can't establish socket

OpenRA.Server/Server.cs

@@ -34,9 +34,16 @@ namespace OpenRA.Server
 			foreach( var m in lobbyInfo.GlobalSettings.Mods )
 				Console.WriteLine("- {0}", m);
 			
+			try
+			{
 				listener.Start();
-
 				Console.WriteLine("Server started.");
+			}
+			catch (Exception e)
+			{
+				Console.WriteLine("Server failed to start.");
+				Environment.Exit(1);	
+			}
 			
 			for (; ; )
 			{
@@ -56,6 +63,7 @@ namespace OpenRA.Server
 				foreach (var c in conns.Where(a => a.Stream != null).ToArray())
 					SendNextChunk(c);
 			}
+
 		}
 
 		static int ChooseFreePlayerIndex()
@@ -320,6 +328,9 @@ namespace OpenRA.Server
 						}
 
 						lobbyInfo.GlobalSettings.Map = s;			
+						foreach(var client in lobbyInfo.Clients)
+							client.SpawnPoint = 0;
+						
 						SyncLobbyInfo();
 						return true;
 					}},