Initial patch by Vajrasky Kok.

Backport the fix from pyton 3.x for this issue.

Grafted from c80083ad142d.

Based on patches by Christian Heimes and Vajrasky Kok

This test requires the ifconfig executable on $PATH, /sbin/, or /usr/sbin.

of the time.  Patch by Julian Gindi.

virtual interface.  Original patch by Kent Frazier.

Issue #19638: Raise ValueError instead of crashing when converting billion character strings to float.

used in the "does the value get passed in properly" test.

compiled on a system with SO_REUSEPORT defined in the headers but run on
a system with an OS kernel that does not support that new socket option.

Document that @property can incorporate a docstring from the getter method.  Improve readabilty with additional whitespace.