dco-win: support for --dev-node

dco-win: support for --dev-node

With --dev-node on Windows, one can specify GUID
of the adapter openvpn should use. Those can be listed with:

  C:\Program Files\OpenVPN\bin>openvpn.exe --show-adapters

While on it, remove "TAP-WIN32 / Wintun" from --show-adapters output.

Github: Fixes OpenVPN/openvpn#336

Change-Id: I57de4d3c069465fb730bb635bfdbdf360fc8c475
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20230518110058.1382-1-lstipakov@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg26702.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>