bug#9794: 24.0.90; `format-time-string' no good for %Z

[Eli Zaretskii]

> Date: Thu, 20 Oct 2011 08:23:29 -0700
> From: Paul Eggert <eggert@cs.ucla.edu>
> CC: Andreas Schwab <schwab@linux-m68k.org>, 9794@debbugs.gnu.org
> 
> The simplest way around the problem, which is what Emacs Lisp
> code does now, is to follow Andreas's advice use %z.  Any
> outside-of-Emacs Lisp code that uses %Z for RFC822 zones should
> be fixed to use %z, because %Z does not work and has never worked
> in general.

OK, thanks for explaining.  I will wait a few days for Jason to agree
or disagree, and if no objections pop up, I will commit the changes to
config.nt.