[Checkins] [zopefoundation/grokcore.site] fff24c: Adapt code to ``zope.site >= 4.4`` thus requiring ...

[Michael Howitz]

  Branch: refs/heads/update-to-zope.site-4.4
  Home:   https://github.com/zopefoundation/grokcore.site
  Commit: fff24c51430c1435c5409aaf911f6800af69f458
      https://github.com/zopefoundation/grokcore.site/commit/fff24c51430c1435c5409aaf911f6800af69f458
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-09-10 (Thu, 10 Sep 2020)

  Changed paths:
    M CHANGES.rst
    M setup.py
    M src/grokcore/site/subscriber.py

  Log Message:
  -----------
  Adapt code to ``zope.site >= 4.4`` thus requiring at least that version.