[Checkins] [zopefoundation/zope.browserresource] a17bbb: Make compatible with Zope 4 (#12)

[Christian Klinger]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.browserresource
  Commit: a17bbbb409cef64719e9b03a3215095ddadbcc37
      https://github.com/zopefoundation/zope.browserresource/commit/a17bbbb409cef64719e9b03a3215095ddadbcc37
  Author: Christian Klinger <cklinger at novareto.de>
  Date:   2019-12-10 (Tue, 10 Dec 2019)

  Changed paths:
    M CHANGES.rst
    M src/zope/browserresource/configure.zcml

  Log Message:
  -----------
  Make compatible with Zope 4 (#12)

Make the registration of the ``FileETag`` adapter conditional on the environment as Zope registers this adapter explicitly in ``Products.Five.browser``.