Correctly report TCP connection timeout on windows.

Correctly report TCP connection timeout on windows.

On nonblocking TCP connects, we set status = ETIMEOUT on failure.
On windows, depending on which header files are included, ETIMEOUT
is defined differently, and this leads to incomprehensible error
messages - so, always use WSAETIMEDOUT here.

Trac #651

Signed-off-by: Leonardo Basilio <leobasilio@gmail.com>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <CACqLfMnBXwSY=MXyc7B1oMKwYE2Z_49G3mpkEPxbSAuG61tgZA@mail.gmail.com>
URL: http://article.gmane.org/gmane.network.openvpn.devel/11085
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 5f5229e41d134b659e502bb2597c711aedaf8096)