lib/nfs/Connection: add method GetEventLoop()

src/lib/nfs/Connection.cxx

@@ -123,7 +123,7 @@ events_to_libnfs(unsigned i)
 
 NfsConnection::~NfsConnection()
 {
-	assert(SocketMonitor::GetEventLoop().IsInside());
+	assert(GetEventLoop().IsInside());
 	assert(new_leases.empty());
 	assert(active_leases.empty());
 	assert(callbacks.IsEmpty());

src/lib/nfs/Connection.hxx

@@ -133,6 +133,10 @@ protected:
 	virtual void OnNfsConnectionError(Error &&error) = 0;
 
 private:
+	EventLoop &GetEventLoop() {
+		return SocketMonitor::GetEventLoop();
+	}
+
 	void DestroyContext();
 	bool MountInternal(Error &error);
 	void BroadcastMountSuccess();