protected void Reload()
        {
            Encryption.RNG.Reload();
            // some logic in configuration updated the config when saving, we need to read it again
            _config = Configuration.Load();
            StatisticsConfiguration = StatisticsStrategyConfiguration.Load();

            if (privoxyRunner == null)
            {
                privoxyRunner = new PrivoxyRunner();
            }
            if (_pacServer == null)
            {
                _pacServer = new PACServer();
                _pacServer.PACFileChanged      += pacServer_PACFileChanged;
                _pacServer.UserRuleFileChanged += pacServer_UserRuleFileChanged;
            }
            _pacServer.UpdateConfiguration(_config);
            if (gfwListUpdater == null)
            {
                gfwListUpdater = new GFWListUpdater();
                gfwListUpdater.UpdateCompleted += pacServer_PACUpdateCompleted;
                gfwListUpdater.Error           += pacServer_PACUpdateError;
            }

            availabilityStatistics.UpdateConfiguration(this);

            _listener?.Stop();
            // don't put PrivoxyRunner.Start() before pacServer.Stop()
            // or bind will fail when switching bind address from 0.0.0.0 to 127.0.0.1
            // though UseShellExecute is set to true now
            // http://stackoverflow.com/questions/10235093/socket-doesnt-close-after-application-exits-if-a-launched-process-is-open
            privoxyRunner.Stop();
            try
            {
                var strategy = GetCurrentStrategy();
                strategy?.ReloadServers();

                privoxyRunner.Start(_config);

                TCPRelay tcpRelay = new TCPRelay(this, _config);
                UDPRelay udpRelay = new UDPRelay(this);
                List <Listener.IService> services = new List <Listener.IService>
                {
                    tcpRelay,
                    udpRelay,
                    _pacServer,
                    new PortForwarder(privoxyRunner.RunningPort)
                };
                _listener = new Listener(services);
                _listener.Start(_config);
            }
            catch (Exception e)
            {
                // translate Microsoft language into human language
                // i.e. An attempt was made to access a socket in a way forbidden by its access permissions => Port already in use
                if (e is SocketException)
                {
                    SocketException se = (SocketException)e;
                    if (se.SocketErrorCode == SocketError.AccessDenied)
                    {
                        e = new Exception(I18N.GetString("Port already in use"), e);
                    }
                }
                Logging.LogUsefulException(e);
                ReportError(e);
            }

            ConfigChanged?.Invoke(this, new EventArgs());

            UpdateSystemProxy();
        }