[Checkins] [zopefoundation/zope.site] 4a6e09: On removal of a site remove the sub of its site ma...

[Michael Howitz]

  Branch: refs/heads/issue-1/fix-delete-site
  Home:   https://github.com/zopefoundation/zope.site
  Commit: 4a6e09e0c0edb640a9295db1998ab677142c2a60
      https://github.com/zopefoundation/zope.site/commit/4a6e09e0c0edb640a9295db1998ab677142c2a60
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-09-09 (Wed, 09 Sep 2020)

  Changed paths:
    M CHANGES.rst
    M src/zope/site/site.py
    M src/zope/site/site.rst

  Log Message:
  -----------
  On removal of a site remove the sub of its site manager on the parent site manager.

Fixes #1.

The implementation is taken from https://github.com/zopefoundation/grokcore.site/blob/fc945c90c5093de8f7ff958cf498eb6305b9c068/src/grokcore/site/subscriber.py#L35-L46