if openvpn exits, restart the container

chaperone.d/openvpn.conf

 openvpn-server.service: {
      command: "/usr/sbin/openvpn --daemon ovpn-tcp-server --cd /etc/openvpn --config /etc/openvpn/tcp.conf",
-     exit_kills: false
+     exit_kills: true
 }