[Bug 51442] Socket connection is not established properly

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51442

--- Comment #24 from Zebediah Figura  ---
I suspect, but haven't confirmed, that we're racing between sock_error() and
poll(). It looks like connection fails, signaling AFD_POLL_WRITE (is this
correct?) while also returning STATUS_CONNECTION_REFUSED. select() throws that
status away because it doesn't care, though, and after the request completes
the program checks for SO_ERROR, but the error was already swallowed.

I'm not sure it's correct that we're signaling AFD_POLL_WRITE, and even if it
is we need to check whether select() should be signalling the writefd and
returning success here.