[issue15025] httplib and http.client are missing response messages for defined WEBDAV responses, e.g., UNPROCESSABLE_ENTITY (422)

[R. David Murray]

Changes by R. David Murray <rdmurray at bitdance.com>:


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nosy: +r.david.murray

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15025>
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