[issue18543] urllib.parse.urlopen shouldn't ignore installed opener when called with any ca* argument

[David Ford (FirefighterBlu3)]

David Ford (FirefighterBlu3) added the comment:

In my quest for completeness, I discovered a lack of handling given HTTP->HTTPS redirect. So I've attached another version of this patch which ensures an HTTPS handler is installed if such a redirect is found.

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Added file: http://bugs.python.org/file39863/urllib.request.py-do-not-overwrite-existing-opener.diff

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