Custom Mender Identiy with mender-convert

I might lean to agreeing to this, but I believe that there is a bigger problem with the current “model”. Yes one could simply add a check not to install files if they are already there. But this would then need to apply to “more files” then mender-device-identity, and it quickly gets a out of hand.

This is something that would be quite easy to accomplish using the upcoming mender-convert tool (which received an overhaul for reasons like this),

Here a “MIDDLE” step is added (which IMO would be the correct location to do this, not BEFORE and AFTER), where one is able to provide rootfs overlays and this would be the location to provide e.g a custom mender-device-identity file.