From: Daniel P. Berrangé on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2917#note_1801...
Consider if in future we have multiple UKIs created, each with their own
SecureBoot signing key. We might need to have the same addon for different
UKIs.
One option is that we have multiple signatures on the same addon binary. The
other option is to namespace things, eg 'virt-fips.addon.efi' and 'something-
fips.add.efi' for a "something" UKI, each signed with their respective
SecureBoot keys.