[issue27377] Add smarter socket.fromfd()

[Martin Panter]

Martin Panter added the comment:

The s.detach() thing isn’t a big deal, but I thought it would simplify the code (eliminate the need for the “finally” clause).

I will try to propose a minor documentation update for SO_PASSCRED as a starting point for adding the others.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27377>
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