Update CHANGES and bump version

CHANGES

@@ -1,3 +1,7 @@
+4.1.7.1 2019-07-14
+- Fix unexpected server delete behavior (#2459)
+- Reduce info log when checking Windows 10 Light Theme
+
 4.1.7 2019-07-10
 - Fix UDP relay (#2387)
 - Support Windows 10 1903 Light Theme (#2379)

shadowsocks-csharp/Controller/Service/UpdateChecker.cs

@@ -24,7 +24,7 @@ namespace Shadowsocks.Controller
         public string LatestVersionLocalName;
         public event EventHandler CheckUpdateCompleted;
 
-        public const string Version = "4.1.7";
+        public const string Version = "4.1.7.1";
 
         private class CheckUpdateTimer : System.Timers.Timer
         {