Cherrypy

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* :issue:`1537`: Disable dependency on pypiwin32 on Python 3.6
until a viable build of pypiwin32 can be made on that
Python version.

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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.