HTTPError doesn't support http.client constants.

[coady]

• I'm submitting a ...
  [x] bug report
  [ ] feature request
  [ ] question about the decisions made in the repository

• Do you want to request a feature or report a bug?
  bug

• What is the current behavior?
  http.client constants aren't accepted as valid input to HTTPError.

• If the current behavior is a bug, please provide the steps to reproduce and if possible a screenshots and logs of the problem.

In []: cherrypy.HTTPError(http.client.NOT_FOUND)
...
Out []: HTTPError: (500, "Illegal response status from server ('HTTPStatus.NOT_FOUND' is non-numeric).")

• What is the expected behavior?
  The same as with any int.

• What is the motivation / use case for changing the behavior?
  It's effectively a Python 3 regression, since Python 2 httplib constants work, and an IntEnum is a valid int.

• Please tell us about your environment:

• Cheroot version: X.X.X
• CherryPy version: 11.X.X
• Python version: 3.6.X
• OS: XXX
• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, e.g. stackoverflow, gitter, etc.)

[webknjaz]

Hi @coady,

Thanks for letting us know. While I cannot promise you an instant fix, I'll gladly accept any contributions (e.g. tests, patch, docs) helping to improve this behavior.