Only compat with windows >= 8

Roger Pack <[email protected]> Wed, 4 Jan 2023 23:36:57 -0700

Newsgroups	gmane.network.gnutls.general
Message-ID	<CAL1QdWcxEoR_YXBwQAMUAXfj2ftrmOnxnx-KND7=rLGHL+wvQw@mail.gmail.com>

As a note, today gnulib appears to have (possibly accidentally) made
itself link against only windows 8 libraries by default.

https://lists.gnu.org/archive/html/bug-gnulib/2022-12/msg00072.html

Maybe gnutls should set
_WIN32_WINNT
to be something lower so by default it can still work in windows 7?

Cheers! :)

-=roger=-