Features:
+* journalctl: -m should access container journals directly by enumerating them via machined, and also watch containers coming and going. Benefit: nspawn --ephemeral would start working nicely with the journal.
+
+* nspawn: don't copy /etc/resolv.conf from host into container unless we are in shared-network mode
+
+* nspawn: optionally automatically add FORWARD rules to iptables whenever nspawn is running, remove them when shut down.
+
+* importd: generate a nice warning if mkfs.btrfs is missing
+
* nspawn: add a logic for cleaning up read-only, hidden container images in /var/lib/machines that are not ancestors of any non-hidden containers
* nspawn: Improve error message when --bind= is used on a non-existing source directory