The py27-pure environment fails as expected while trying to use the
not-yet optional AccessControl C extension.

In functional doc tests you can apparently have a test case that has
no runTest method.  Until now the Testing package added a dummy
runTest method in that case, and set it to None.

But when this dummy runTest method gets called, you get an error:

  Error in test runTest (Testing.ZopeTestCase.ZopeTestCase.FunctionalTestCase)
  Traceback (most recent call last):
    File ".../lib/python2.7/unittest/case.py", line 329, in run
      testMethod()
  TypeError: 'NoneType' object is not callable

Simply importing Testing.ZopeTestCase.FunctionalTestCase in a new test
file may be enough to trigger this.

So this has something to do with the order in which tests are found.

I fixed it by making the dummy runTest method callable.

Apply plonehotfix 20170717 [master]

This applies PloneHotfix20170117.

Patch zope.interface to remove docstrings and avoid publishing.

From Products.PloneHotfix20161129.

Moved patch_persistent to the new 'patches' folder.

Don't copy items the user is not allowed to view. [master]

From Products.PloneHotfix20161129.

This reverts part of commit dbb476e6.

This removes the mechanize dependency.

* Add a hint to the next step.
* Add a hint how to create content for the default page.
* There will be no 2.x version after 2.7.

As described in the definition document by the ietf:
https://tools.ietf.org/html/draft-west-first-party-cookies-07

"The 'SameSite' attribute allows servers to assert that a cookie
ought not to be sent along with cross-site requests. This assertion
allows user agents to mitigate the risk of cross-origin information
leakage, and provides some protection against cross-site request
forgery attacks."

Remove unused klass_args argument and avoid aborting transactions if
none is active. The publisher should always commit or abort the
transaction, so the Cleanup instance in `REQUEST._hold` shouldn't need
to abort anything. This gets rids of debug log messages, where each
request opens and aborts a secondary transaction.