While we're at it with migration, might as well add a host_flags field
so that if we have host-specific configuration flags we want to add
later on, we only have to do a migration once.
Pretty raw and untested code which migrates data from v2 to v3,
introducing a new field in the process. This field is neither editable
as of now nor is it honored if it were set.
We want to introduce a new feature (volumes with discard support) which
will cause file incompatibility. This means we need to prepare data
migration code. This prepares that change.
We'll now parse the response messages on the client side, abort after a
previously defined timeout and trigger the LUKS unlocking process, if
requested (although the latter isn't fully implemented yet).
Work in transcribing the binary LUKS PSK to ASCII. Still buggy, had an
error in thinking (it's not 4 bytes transcribed to 3, but 3 to 4 of
course). Needs fixing.
