pfSense

See #12980 for more info. OpenVPN shared key is being deprecated. It isn't being removed yet, but will be in the near future. Users should be discouraged from creating new shared key servers or clients, but not prevented. Users of existing instances should be warned to migrate away from shared key ASAP.

We should at least display a highly visible warning in the GUI if a user selects shared key for an OpenVPN client or server. Maybe also show a similar warning on the server and client lists.

We may also want to trigger a warning of some sort on the first boot post upgrade if any shared key tunnels are configured on the firewall, but that may be overkill for this release.