Up

When you want to create "complicated" openvpn setups, you need to run some shell script after the VPN starts. Like adding tap0 to bridge, or similar. This patch allows such change.

Maybe better approach would be to expose two new parameters "up_source" and "up_content" which would work in similar way like "source" and "content" on file resource. So it will allow not only configuring path to script, but also defining script contents.