Update GFWList URL

shadowsocks-csharp/Controller/Service/GfwListUpdater.cs

@@ -12,7 +12,7 @@ namespace Shadowsocks.Controller
 {
     public class GFWListUpdater
     {
-        private const string GFWLIST_URL = "https://autoproxy-gfwlist.googlecode.com/svn/trunk/gfwlist.txt";
+        private const string GFWLIST_URL = "https://raw.githubusercontent.com/gfwlist/gfwlist/master/gfwlist.txt";
 
         private static string PAC_FILE = PACServer.PAC_FILE;
 
@@ -97,4 +97,4 @@ namespace Shadowsocks.Controller
             return valid_lines;
         }
     }
-}
+}