bug#17330: files.el cd-absolute overcome false negative from file-executable-p

[Glenn Morris]

Stefan Monnier wrote:

> So, we could solve this problem either by dropping this error, or by
> using call-process instead of file-executable-p.  Yet another way would
> be to provide a new subroutine that gives access to chdir somehow
> (e.g. "file-chdirable-p").

I'd still like to hear if file-accessible-directory-p does any better
than file-executable-p. At least on !DOS_NT, it seems to be something a
bit different.

> I think the simplest solution for now is to turn the error into a warning.

Sounds good, but might be annoying on Unix platforms; if as you say
this situation is impossible there an error might be clearer for them.