bug#27919: 25.2.50; dired + eshell-ls: fallback to external ls fails

[Drew Adams]

> > Does ls-lisp provide more than just dired-suited output?
> 
> Not really.  But it has options like ls-lisp-dirs-first,
> ls-lisp-ignore-case, ls-lisp-format-time-list, and
> ls-lisp-use-localized-time-format.

And such options are also supported by libraries such as
`dired-sort-menu.el' (also by Francis J. Wright).

https://www.emacswiki.org/emacs/DiredSortMenu