Delete the IPv6 route to the "connected" network on tun close

Delete the IPv6 route to the "connected" network on tun close

This was missing on Windows when interactive service is in use.

v3: Mar 1, 2017: avoid code repetition and rebase to master

Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1519936484-26102-1-git-send-email-selva.nair@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg16598.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit b607900ba937b5f45796d2e3810ef91a32826927)