[issue20679] 3.4 cherry-pick: 587fd4b91120 improve Enum subclass behavior

[Ethan Furman]

New submission from Ethan Furman:

587fd4b91120: Better pickle support for Enum subclasses.

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assignee: larry
messages: 211552
nosy: ethan.furman, larry
priority: release blocker
severity: normal
stage: commit review
status: open
title: 3.4 cherry-pick: 587fd4b91120  improve Enum subclass behavior
type: behavior
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20679>
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