+DeviceDispatcher::unsubscribeHostAddressUpdates

mldiscover/DeviceDispatcher.h

@@ -59,12 +59,16 @@ public:
                 Qt::UniqueConnection);
         connect(obj, &T::destroyed,
                 filter, &QObject::deleteLater);
+        connect(this, &DeviceDispatcher::unsubscribeHostAddressUpdates,
+                filter, &DeviceDispatcherFilter::destroy,
+                Qt::UniqueConnection);
         tryConnect(index);
     }
 
 signals:
     void setHostAddress(const DeviceIndex &, const QHostAddress &);
     void deviceListChanged(const DeviceIndexEnabledMap &);
+    void unsubscribeHostAddressUpdates(const DeviceIndex &i, QObject *_parent = nullptr) const;
 
 public slots:
     void lldpCacheUpdated(const LldpInfoCache &new_cache);