bug#33336: 26; Document how to restore trashed files

[Eli Zaretskii]

> Date: Sun, 11 Nov 2018 08:47:28 -0800 (PST)
> From: Drew Adams <drew.adams@oracle.com>
> Cc: drew.adams@oracle.com, 33336@debbugs.gnu.org
> 
> But this would presumably require recording the original
> directory, to where each file should be restored (by default).
> And the "restoring" code would need to, e.g., prompt the user
> for some alternative directory if the recorded directory no
> longer existed.

That's exactly what the freedesktop spec does, and the side effect is
that the files in the trash don't have their original names.

> The Emacs doc for this can make clear that Emacs may not
> be able to help in some cases where the system trash bin
> is used, and in such cases users should consult their
> system doc for how to restore a file. 

I added there yesterday a sentence saying that restoring files from
trash needs system-dependent tools.  I don't think we need to do more.