server: use errors.Is for error comparison

server.go

@@ -3604,7 +3604,7 @@ func (s *server) establishPersistentConnections() error {
 	// attempt to connect to based on our set of previous connections. Set
 	// the reconnection port to the default peer port.
 	linkNodes, err := s.chanStateDB.LinkNodeDB().FetchAllLinkNodes()
-	if err != nil && err != channeldb.ErrLinkNodesNotFound {
+	if err != nil && !errors.Is(err, channeldb.ErrLinkNodesNotFound) {
 		return fmt.Errorf("failed to fetch all link nodes: %w", err)
 	}