Don't document fclean

[Carlos O'Donell]

On Sun, Feb 26, 2012 at 7:38 PM, Joseph S. Myers
<joseph@codesourcery.com> wrote:
> The manual documents a function called fclean, which has no
> implementation in glibc.  I propose this patch to remove that
> documentation, so eliminating some references to the GNU system which
> actually refer to an empty set of systems.
>
> 2012-02-27  Joseph Myers  <joseph@codesourcery.com>
>
>        * manual/llio.texi (fclean): Remove documentation.

What's the history here? What *is* fclean?

I'm OK with removing the references since it's bogus, but where did it
come from?

Cheers,
Carlos.