Cherrypy

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* Consolidated some documentation and include the more
concise readme in the package long description, as found
on PyPI.

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* :issue:`1463`: CherryPy tests are now run under pytest and
invoked using tox.

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* :issue:`1530`: Fix the issue with TypeError being swallowed by
decorated handlers.

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* :issue:`1508`

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* :issue:`1497`: Handle errors thrown by ``ssl_module: 'builtin'``
when client opens connection to HTTPS port using HTTP.

* :issue:`1350`: Fix regression introduced in v6.1.0 where environment
construction for WSGIGateway_u0 was passing one parameter
and not two.

* Other miscellaneous fixes.

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* :issue:`1473`: ``HTTPError`` now also works as a context manager.

* :issue:`1487`: The sessions tool now accepts a ``storage_class``
parameter, which supersedes the new deprecated
``storage_type`` parameter. The ``storage_class`` should
be the actual Session subclass to be used.

* Releases now use ``setuptools_scm`` to track the release
versions. Therefore, releases can be cut by simply tagging
a commit in the repo. Versions numbers are now stored in
exactly one place.