Portability patches vs 1.7.0.2 [6/6]

## Generated configure, for completeness

The resulting automatically generated files from any changes we had to
make to the configury to get everything to build on all our supported
architectures.

I'm including this patch so that you can see what the extra macro
calls I added to configure.ac do, without having to dig around in the
gnulib or autoconf extras repositories.  You probably shouldn't
actually apply this patch (assuming you even keep the generated
configure script under version control), but it might help illustrate
the portability tests we needed to add to configure.ac better, to help
you decide wither to add them to the upstream.

Cheers,
-- 
Gary V. Vaughan (gary@thewrittenword.com)