Update config.guess, config.sub, texinfo.tex

[Eli Zaretskii]

> Date: Wed, 05 Jul 2000 18:47:10 +1000
> From: Andrew Cagney <ac131313@cygnus.com>
> 
> (I've just got back to this) I intend bringing in:
> 
> \def\texinfoversion{2000-05-28.15}
> 
> obtained from ftp://ftp.gnu.org/gnu/texinfo.tex (I couldn't find the
> file manual/texinfo.tex :-)  The differences between it and the current
> texinfo.tex (from makeinfo 4.0) are attatched.
> 
> Any problems?

I don't see any.  Most of the changes are for PDFTeX, anyway.

Of course, it would be useful to actually try to produce a printed
copy with the new texinfo.tex, before committing ;-).