bug#71438: [PATCH] Allow ping to receive optional arguments

[Stefan Kangas <stefankangas@gmail.com>]

TOMAS FABRIZIO ORSI <torsi@fi.uba.ar> writes:

> However, I've been thinking. Both my original patch and yours
> ask the user for additional flags if *any* prefix argument is
> passed.
> Isn't that closing the door for further additions to this
> function?
>
> Maybe, it would be better if (for instance) "0" is passed
> as a prefix argument.
> In that way, if any other additions were to be made,
> those could use a different prefix argument (1,2,3, and so on);
> thus avoiding backwards incompatibility.

This is not a problem, and we can easily make such changes later.

One prefix argument is equivalent to 4 (C-u C-u is 16, and so on).
See (info "(elisp) Prefix Command Arguments").