[issue33540] socketserver: Add an opt-in option to get Python 3.6 behaviour on server_close()

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

I consider that it's a regression, so I pick the release blocker priority. Sorry Ned!

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nosy: +ned.deily
priority: normal -> release blocker

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33540>
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