(dired-use-ls-dired): New variable.

(dired-use-ls-dired): New variable.
(dired-directory): Document the rules better.

(dired-insert-headerline): Function deleted.
(dired-revert): Pass no args to dired-readin.
(dired-move-to-filename): First try using dired-filename property.
(dired-move-to-end-of-filename): Likewise.
(dired-why): Try to show the start of this page of warnings.
(dired-log): Insert the buffer name at start of page, not end.
(dired-log-summary): If just one failure, explain it in echo area.

(dired-internal-noselect): Always set dired-directory, when buffer is not new.
Pass dir-or-list, not dirname, to dired-mode.
Call dired-readin with no args.
Don't call dired-after-readin-hook here.
(dired-find-buffer-nocreate): Expand dirname.
Expand the dir from dired-directory to compare with dirname.

(dired-readin): Take no args.  Get the directory from dired-directory.
Run dired-before-reading hook inside save-excursion.
Run dired-after-readin-hook here.
Don't make undo entries at all.
Call dired-readin-insert with no args.
Don't change indentation here.
Don't insert headerline here.

(dired-readin-insert): Take no args.
Get dir and file-list from dired-directory.
Call dired-insert-directory the new way.
Don't insert "wildcard" info here.

(dired-insert-directory): New arg FILE-LIST.
First arg now DIR, always just the directory.
This function fully handles setting up the buffer text:
update indentation, insert headerline and "wildcard" info.
Pass --dired arg if appropriate; put info in dired-filename props.
Don't expand file names here.