[3.7] bpo-33792: Add selector and proactor windows policies (GH-7487)#7508

Merged

miss-islington merged 1 commit intopython:3.7from miss-islington:backport-8f40429-3.7

Jun 8, 2018

+45-3

Commits on Jun 8, 2018

bpo-33792: Add selector and proactor windows policies (pythonGH-7487 )

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