bug#29231: 26.0.90; invald file name for symbolic files

[Eli Zaretskii]

> Date: Sat, 11 Nov 2017 18:25:20 +0000
> From: Alan Third <alan@idiocy.org>
> Cc: Vincent Zhang <vincent_chueng@hotmail.com>, 29231@debbugs.gnu.org,
>       Paul Eggert <eggert@cs.ucla.edu>
> 
> Only with symlinks faccessat returns success if it’s pointing to a
> file and you put ‘/’ on the end. It looks like perhaps adding / to the
> end ‘resolves’ symlinks:
> [...]
> Perhaps revert to the old behaviour for Darwin OS?

Yes, if no better ideas come up, we should revert to calling 'stat' on
Darwin, IMO.