[issue27652] Make use of non-standard error number ESHUTDOWN optional

[Roundup Robot]

Roundup Robot added the comment:

New changeset 77d16a5dc779 by Berker Peksag in branch 'default':
Issue #27652: Expose ESHUTDOWN conditionally
https://hg.python.org/cpython/rev/77d16a5dc779

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27652>
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