Features:
+* gpg2 compat
+
+* When logging about multiple units (stopping BoundTo units, conflicts, etc.),
+ log both units as UNIT=, so that journalctl -u triggers on both.
+
* to allow "linking" of nspawn containers, extend --network-bridge= so
that it can dynamically create bridge interfaces that are refcounted
by the containers on them. For each group of containers to link together