Subject: Re: bug#20960: handling /etc/ssl/certs/ca-bundle.crt by default in emacs

From: Glenn Morris <[email-masked]>
Date: Thu, 02 Jul 2015 11:38:25 -0400

Eli Zaretskii wrote:

>> (setq smime-CA-directory "/etc/ssl/certs/ca-bundle.crt")

On my RHEL7 system, this isn't a directory.
It is a symlink to /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem,
a file.

> That file name is platform-dependent, and even on Unix the bundle can
> be found in several different directories.

So let's compile a list of the standard places and default to the first
that exists, similar to what gnutls-trustfiles does. (Does these two
variables duplicate each other?)