Features:
+* We should start measuring all services, containers, and system extensions we
+ activate. probably into PCR 13. i.e. add --tpm2-measure-pcr= or so to
+ systemd-nspawn, and MeasurePCR= to unit files. Should contain a measurement
+ of the activated configuration and the image that is being activated (in case
+ verity is used, hash of the root hash).
+
* whenever we measure something into a TPM PCR from userspace, write a record in
TCG's "Canonical Event Log" format to some file, so that we can reason about
how PCR values we manage came to