[Checkins] [zopefoundation/Zope] dd61b8: Add announcement channels.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: dd61b836cd5b73d619a50164932388165defabd1
      https://github.com/zopefoundation/Zope/commit/dd61b836cd5b73d619a50164932388165defabd1
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-04-23 (Mon, 23 Apr 2018)

  Changed paths:
    M docs/maintenance.rst

  Log Message:
  -----------
  Add announcement channels.