This should repair PySECURITY_ATTRIBUTES problems that
(mostly) Plone users report using recent Zopes on
Windows.

This change is in the 2.8.4 Windows installer I just
published on zope.org.  Alas, the 2.8.4 tarball there
(and the 2.8.4 tag) differs from the source used to build
the 2.8.4 Windows installer (by this one character,
bumping W32ALLVERSION in inst/WinBuilders/mk/python.mk).