Archie Cobbs ccde72a411 When poll(2)'ing for readability or writability of a file descriptor
on behalf of a thread, we should check the POLLERR, POLLHUP, and
POLLNVAL flags as well to wake up the thread in these cases.

Suggested by:	deischen
MFC after:	3 days
2002-08-29 00:44:11 +00:00
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