shell32: add configure option --disable-unixfs

[Dan Kegel]

On Wed, Apr 28, 2010 at 12:48 PM, Alexandre Julliard
<julliard at winehq.org> wrote:
> Dan Kegel <dank at kegel.com> writes:
>
>> Fixes http://bugs.winehq.org/show_bug.cgi?id=22450
>
> There's no reason to do that in configure.

Right then, I'll do something in the registry.
(Although maybe I can live with the existing registry key
if I also do
  echo disable > $WINEPREFIX/.update-timestamp
)