Zope.traversing

===================

- Fix ZCML-related dependencies.

=================

- When a ``__parent__`` attribute is available on an object, it is
always used for absolute URL construction, and no ILocation adapter
lookup is performed for it. This was the previous behavior but was
broken (around 3.5?) due to dependency refactoring.

If the object provides no ``__parent__`` then an ILocation adapter
lookup will be performed. This will always succeed as zope.location
provides a default LocationProxy for everything, but more specific
ILocation adapters can also be provided.

===================

- Remove use of ``zope.testing.doctestunit`` in favor of stdlib's doctest.

===================

- Avoid testing dependencies on ``zope.securitypolicies`` and
``zope.principalregistry``.

===================

- Remove testing dependency on ``zope.app.publication``.

===================

- Remove stray test claiming a no longer existing dependency on
``zope.app.applicationcontrol``.

- Refactor functional tests to loose dependency on both
``zope.app.appsetup`` and ``zope.app.testing``.

- Simplify tests for the ``browser`` sub-package by using ``PlacelessSetup``
from ``zope.component.testing`` instead of ``zope.app.testing``.

- Simplify ``test_dependencies`` module by using ``zope.configuration``
instead of ``zope.app.testing.functional``.

- Remove testing dependency on ``zope.app.publisher``.

- Replace testing dependency on ``zope.app.security`` with
``zope.securitypolicy``.

- Remove testing dependency on ``zope.app.zcmlfiles`` in favor of more
explicit dependencies.

- Remove testing dependency on ``zope.app.component``.

- Replace a test dependency on ``zope.app.zptpage`` with a dependency on
``zope.pagetemplate``.