[v3] remove non-standard basic_filebuf members, fd, FILE filebufs

[Nathan Myers]

On Tue, Apr 30, 2002 at 07:20:31PM +0000, Nathan Myers wrote:
> I can live with names c_filebuf, FILE_filebuf, c_file_buf, or 
> stdio_filebuf for that version.  I prefer the last as clearest.

Also, an historical note: the Jerry Schwarz version was called stdiobuf.
I like that, too.

Nathan Myers
ncm at cantrip dot org