[issue26804] Prioritize lowercase proxy variables in urllib.request

[Roundup Robot]

Roundup Robot added the comment:

New changeset 49b975122022 by Senthil Kumaran in branch '3.5':
Issue #26804: urllib.request will prefer lower_case proxy environment variables
https://hg.python.org/cpython/rev/49b975122022

New changeset 316593f5bf73 by Senthil Kumaran in branch 'default':
merge 3.5
https://hg.python.org/cpython/rev/316593f5bf73

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nosy: +python-dev

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<http://bugs.python.org/issue26804>
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