SMB/CIFS share breaks when it contains a symlink entry that can't be accessed #15876

/**
         * get the best guess for the modification time of the share
         *
         * @return int
         */
        private function shareMTime() {
                $highestMTime = 0;
                $files = $this->share->dir($this->root);
                foreach ($files as $fileInfo) {
                        try {
                                if ($fileInfo->getMTime() > $highestMTime) {
                                        $highestMTime = $fileInfo->getMTime();
                                }
                        } catch (NotFoundException $e) {
                                // Ignore this, can happen on unavailable DFS shares
 -                        }
 +                       } catch (ForbiddenException $e) {
 +                               // Ignore this too : symlink
 +                       }
                }
                return $highestMTime;
        }