[issue20311] epoll.poll(timeout) and PollSelector.select(timeout) must round the timeout to the upper bound

[STINNER Victor]

STINNER Victor added the comment:

> Looks like 3b8a2281d323aa9abf497192b01cf9
06b98ed3d8 broke the buildbots.

Oh, I didn't watch buildbots, sorry. It should be fixed by f453443c96e4.

My first attempt used an attribute using a default value of None, but
it was harder to use: I had to check if the value is None or not. I
prefer to enforce an implementation to define the resolution. Or do
you know a selector which has no resolution?

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<http://bugs.python.org/issue20311>
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