update to GeoIP2 and parse the database only once

closes #4227

OpenRA.Mods.RA/OpenRA.Mods.RA.csproj

@@ -502,10 +502,6 @@
       <Project>{85B48234-8B31-4BE6-AF9C-665CC6866841}</Project>
       <Name>OpenRA.Irc</Name>
     </ProjectReference>
-    <ProjectReference Include="..\GeoIP\GeoIP.csproj">
-      <Project>{021DDD6A-A608-424C-9A9A-252D8A9989E0}</Project>
-      <Name>GeoIP</Name>
-    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">

OpenRA.Mods.RA/Widgets/Logic/LobbyUtils.cs

@@ -12,6 +12,7 @@ using System;
 using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
+using MaxMind.GeoIP2;
 using OpenRA.Graphics;
 using OpenRA.Network;
 using OpenRA.Primitives;
@@ -197,9 +198,15 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 
 		public static string LookupCountry(string ip)
 		{
-			var ip2geo = new GeoIP.LookupService("GeoIP.dat", GeoIP.LookupService.GEOIP_MEMORY_CACHE);
-			var country = ip2geo.getCountry(ip);
-			return country.getName();
+			try
+			{
+				return Game.GeoIpDatabase.Omni(ip).Country.Name;
+			}
+			catch (Exception e)
+			{
+				Log.Write("geoip", "LookupCountry failed: {0}", e);
+				return "Unknown Location";
+			}
 		}
 
 		public static void SetupClientWidget(Widget parent, Session.Slot s, Session.Client c, OrderManager orderManager, bool visible)