(Merge 3.3) Issue #20311: select.epoll.poll() now rounds the timeout away from

zero, instead of rounding towards zero. For example, a timeout of one
microsecond is now rounded to one millisecond, instead of being rounded to
zero.

diff --cc Lib/test/test_epoll.py
Simple merge

diff --cc Misc/NEWS
Simple merge

diff --cc Modules/selectmodule.c
Simple merge