message: nydus-image: sort v6 dirents again due to inproper `.' and `..' order
  `.' and `..' wasn't added when sorting v6 dirents.
diff: @@ -289,6 +289,9 @@ impl Bootstrap {
  dirs.push(child);
  }
  }
  + /* XXX: `.' and `..' should be sorted globally too */
  + node.dirents
  + .sort_unstable_by(|a, b| a.1.as_os_str().cmp(&b.1.as_os_str()) as std::cmp::Ordering);
  for dir in dirs {
  self.update_dirents(nodes, dir, tree.node.offset);
  