- "const" properties (posted)
- port exit-on-idle logic to byebye ioctl
- make use of "drop" ioctl in pid 1 bus activation
+ - bus proxy: override unique id sender for messages from driver to match the well-known name
+ - bus driver: GetNameOwner() for "org.freedesktop.DBus" should return "org.freedesktop.DBus"
* sd-event
- allow multiple signal handlers per signal?