- move to gvariant
- minimal locking around the memfd cache
- keep the connection fds around as long as the bus is open
- - make ref counting atomic
- merge busctl into systemctl or so?
+ - synthesize sd_bus_message objects from kernel messages
* in the final killing spree, detect processes from the root directory, and
complain loudly if they have argv[0][0] == '@' set.