Products.sessions

-----------------

- Improve out-of-the-box experience by instantiating a session data container
if the session data manager uses the default configuration that points
to a temporary folder

- Reinstate simple sessioning with ``Products.TemporaryFolder``
(`43 <https://github.com/zopefoundation/Products.Sessions/issues/43>`_)

-----------------

- Reduce usage of deprecated ``tempstorage`` for testing and remove warnings
(`41 <https://github.com/zopefoundation/Products.Sessions/issues/41>`_)

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- Add support for Python 3.9

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- Don't break completely when no session data container is available
(`35 <https://github.com/zopefoundation/Products.Sessions/issues/35>`_)

----------------

- Make the product compatible with ``transaction`` version 3
(`32 <https://github.com/zopefoundation/Products.Sessions/issues/32>`_)

----------------

- Banish dependency on ``Products.TemporaryFolder`` into a tests extra
and point out its issues under Zope 4 in the README.
(`26 <https://github.com/zopefoundation/Products.Sessions/issues/26>`_)

- Switch tests dependencies to Zope 4.x branch to retain Python 2 compatibility

- Fix access permissions for ``meta_type`` and ``zmi_icon`` properties so
they don't raise when accessed in the admin interface.
(`24 <https://github.com/zopefoundation/Products.Sessions/pull/24>`_)

- Fix Python 3 compatibility of ``_p_resolveConflict``.
(`25 <https://github.com/zopefoundation/Products.Sessions/pull/25>`_)