bug#18150: 24.3.92; Uppercase umlauts and case-fold-search t

[Eli Zaretskii]

> Date: Tue, 16 Feb 2016 20:57:41 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 18150@debbugs.gnu.org, mbork@mbork.pl
> 
> If, when case-fold-search is non-nil, we want both [:upper:] and
> [:lower:] to match any letter that has a case variant, then the patch
> below seems to do the job.  Does anyone see a problem with it?

No further comment, so I pushed a slightly safer change to emacs-25
branch, and I'm marking this bug done.

Thanks.