Openvpn with torrent client

Put configuration files into /etc/openvpn/client and create a file /etc/docker-vpn.conf:

OVPN_CONFIGURATION_FILE=#name of file in /etc/openvpn/client, NOT the full path

Run make build to generate the docker image and ./start to start connect to the vpn inside the image.

make install installs the start script under /usr/local/bin/docker-vpn.