bug#10598: 24.0.92; run dired-do-async-shell-command on multiple files individually

[Roland Winkler]

On Fri Jul 13 2012 Juri Linkov wrote:
> At least with a variable the users can do something like
> 
> (define-key dired-mode-map ";"
>   (lambda ()
>     (interactive)
>     (let ((dired-async-each nil))
>       (call-interactively 'dired-do-async-shell-command))))

Would it make sense to provide such a command for everyone? If
dired-async-each is not even intended to be customizable, I cannot
think of too many other options to use this variable in a meaningful
way. Anyway, in real life I expect that according to Murphy's Law
whatever customization a user chooses for this variable, next time
he or she needs to run dired-do-async-shell-command, the customized
value will be the wrong one.