make sure sa_family_t is defined

On Windows there's no sa_family_t. This patch defines it in
syshead.h is configure did not find it in the system headers.

Signed-off-by: Heiko Hund <heiko.hund@sophos.com>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <1389972638-8006-1-git-send-email-heiko.hund@sophos.com>
URL: http://article.gmane.org/gmane.network.openvpn.devel/8242
Signed-off-by: Gert Doering <gert@greenie.muc.de>
convert struct signal_info element

This one place was forgotten when the elements type was changed
from bool to int in the dual stack patch 23d61c56.

Signed-off-by: Heiko Hund <heiko.hund@sophos.com>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <1389972638-8006-2-git-send-email-heiko.hund@sophos.com>
URL: http://article.gmane.org/gmane.network.openvpn.devel/8243
Signed-off-by: Gert Doering <gert@greenie.muc.de>