OpenVPN option to disable encryption

In rare cases it’s required to run an OpenVPN tunnel without encryption. This is a valid option in OpenVPN, but implemented in VyOS.
I would request that this be added to interfaces openvpn <intf> encryption cipher as option none.
It should display a warning on commit, similar to the OpenVPN warning in the log.
The workaround for currently is to add openvpn-option "cipher none"

I wouldn’t mind being the one, adding this feature.