internal/poll: disable SIO_UDP_NETRESET on Windows

[raggi]

Windows UDP sockets have novel behavior in response to ICMP, where by default RecvFrom will receive a read error as a result of an incoming ICMP packet. This behavior is not portable or consistent with behavior on other platforms, so for consistency it is disabled here.

This is similar to, but a different case from the prior change 3114bd6 / https://golang.org/issue/5834 that disabled one of the two flags influencing behavior in response to the reception of related ICMP.

Updates #5834
Updates #68614

[raggi]

Draft, as I can't remember how the vendored x/ repos are rolled, and this depends on golang/sys#210.

This also ideally needs a test case, but it may be trickier to arrange than for SIO_UDP_CONNRESET.

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[gopherbot]

Message from Gopher Robot:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from Brad Fitzpatrick:

Patch Set 1:

(1 comment)

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