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Marc Hoersken 55165a1ae3 Cygwin: make sure failed sockets always signal writability
Since FD_CONNECT is only given once, we manually need to set
FD_WRITE for connection failed sockets to have consistent
behaviour in programs calling poll/select multiple times.

Example test to non-listening port: curl -v 127.0.0.1:47
2020-10-14 10:54:23 -04:00
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