openvpnmsica: "TAP" => "TUN/TAP"

openvpnmsica: "TAP" => "TUN/TAP"

The function and property names that are common to TAP and TUN from
TAP-Windows6 and TUN from Wintun were renamed not to make the now
mainstream TUN sad.

I would have go with just the "adapter". But, wouldn't that cause
confusion when user sees "Deleting adapters" when uninstalling the
OpenVPN?

Internal variable names were simplified thou to omit the TUN/TAP
referencing.

Signed-off-by: Simon Rozman <simon@rozman.si>
Acked-by: Lev Stipakov <lstipakov@gmail.com>
Message-Id: <20200309131728.380-8-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg19526.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>