Use new libtorrent-1.1 settings API

src/base/net/portforwarder.h

@@ -49,12 +49,12 @@ namespace Net
         static void freeInstance();
         static PortForwarder *instance();
 
+        bool isEnabled() const;
+        void setEnabled(bool enabled);
+
         void addPort(qint16 port);
         void deletePort(qint16 port);
 
-    private slots:
-        void configure();
-
     private:
         explicit PortForwarder(libtorrent::session *const provider, QObject *parent = 0);
         ~PortForwarder();