Features:
+* journalctl --image= which is like --root= but operates on disk images
+
+* when systemd-nspawn and suchlike dissect an OS image, and there are multiple
+ root partitions, do an strverscmp() on the partition label and boot
+ first. That is inspired how sd-boot figures out which kernel to boot, and
+ thus allows defining OS images which can be A/B updated and we default to the
+ newest version automatically, both in nspawn and in sd-boot
+
* drop sd_bus_message_set_priority() from sd-bus API and documentation as much
as we can, it's a kdbus left-over and unlikely to come back on AF_UNIX, since
it's not really implementable there.