Add option to bind directly to an IP instead of using a network Interface

src/gui/advancedsettings.h

@@ -63,6 +63,7 @@ private:
               cb_super_seeding, cb_program_notifications, cb_tracker_status,
               cb_confirm_torrent_recheck, cb_enable_tracker_ext, cb_listen_ipv6, cb_announce_all_trackers;
     QComboBox combo_iface;
+    QLineEdit txt_announce_address;
     QLineEdit txt_network_address;
 
     // OS dependent settings