* Add an openvpn_server variable
* Move ${openvpn_client}.{key,csr,crt} to
${openvpn_client}/client.{key,csr,crt}
* Generate ${openvpn_client}/${openvpn_server}.ovpn config file
* Copy over a self contained directory of file per client that can be
imported by networkmanager in ubuntu or run directly with `sudo
openvpn ${openvpn_server}.ovpn