[3.6] bpo-31334: Fix timeout in select.poll.poll() (GH-3277) #4033
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Always pass -1, or INFTIM where defined, to the poll() system call when
a negative timeout is passed to the poll.poll([timeout]) method in the
select module. Various OSes throw an error with arbitrary negative
values.
(cherry picked from commit 6cfa927)
https://bugs.python.org/issue31334