Set WINS servers via interactice service

Set WINS servers via interactice service

At the moments WINS servers are set either:

 - via DHCP, which works only for tap-windows6 driver
 - via netsh when running without interactice service

This means that in 2.6 default setup (interactive service and dco)
WINS is silently ignored.

Add WINS support for non-DHCP drivers (like dco) by passing
WINS settings to interactive service and set them there with
netsh call, similar approach as we use for setting DNS.

Fixes https://github.com/OpenVPN/openvpn/issues/373

Change-Id: I47c22dcb728011dcedaae47cd03a57219e9c7607
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20230728131246.694-1-lstipakov@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg26903.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>