setup: use setuptools on Windows (issue5400)
We've had a long, complicated history with setuptools. We want to
make it the universal default. But when we do, it breaks things.
`python setup.py build` is broken on Windows today. Forcing
the use of setuptools via FORCE_SETUPTOOLS=1 unbreaks things.
Since the previous bustage with making setuptools the default
was on !Windows, it seems safe to move ahead with the setuptools
transition on Windows. So this patch does that.
#require docutils gettext
Error: the current ro localization has some rst defects exposed by
moving pager to core. These two warnings about references are expected
until the localization is corrected.
$ $TESTDIR/check-gendoc ro
checking for parse errors
gendoc.txt:58: (WARNING/2) Inline interpreted text or phrase reference start-string without end-string.
gendoc.txt:58: (WARNING/2) Inline interpreted text or phrase reference start-string without end-string.