Texinfo docs/target

I've been using a texinfo (more precisely: info) version of the docs
for some weeks now, and really came to love it. It is still the
version I mentioned here:
<http://archives.postgresql.org/pgsql-general/2005-10/msg01813.php>

Now I'm wondering, if it'd be worth fixing the index and some minor
encoding deficiencies (e.g. medium-length dashes end up as "[mdash]"),
and adding Autoconf support in order to make it a proper target.

I remember other requests for info-docs on the lists than the above,
but it is rather hard to search for them :-/.

regards,
Andreas
--