bug#16577: 24.3; Ido omitting directories with similar names to other directories

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: vmalloc@gmail.com,  16577@debbugs.gnu.org
> Date: Tue, 28 Jan 2014 13:59:40 -0500
> 
> Emacs should only ignore ".git" directories.
> It should not ignore "foo.git" directories.

Then completion-ignored-extensions is not the right mechanism for
ignoring those directories.

(I'm quite sure that this was discussed in some distant past, just not
about Git.)