[PATCH] Fix warning during manpage generaton

[Corinna Vinschen]

On Oct 28 09:53, Jon Turney wrote:
> > ERROR: xref linking to Stubs has no generated link text.
> > Error: no ID for constraint linkend: Stubs.
> 
> (Despite saying "ERROR", this is actaully a warning and manpages are
> still generated)
> 
> Improve chapter-texi2docbook so it generates elements for texinfo
> sections as well, so that a cross-reference to the "Stubs" section
> contains a valid element ID.

Thanks, please push.


Corinna