- see if we can drop more message validation on the sending side
- add API to clone sd_bus_message objects
- SD_BUS_COMMENT() macro for inclusion in vtables, syntax inspired by gdbus
- - systemd-bus-proxyd needs to synthesize NameLost/NameAcquired
- systemd-bus-proxyd needs to enforce good old XML policy
- upload minimal kdbus policy into the kernel at boot
- kdbus: matches against source or destination pids for an "strace -p"-like feel. Problem: The PID info needs to be available in userspace too...