+ - allow updating attach flags during runtime
+ - pid1: peek into activating message when activating a service
+ - test bloom filter generation indexes
+ - introduce sd_bus_emit_object_added()/sd_bus_emit_object_removed() that automatically includes the build-in interfaces in the list
+ - port to sd-resolve for connecting to TCP dbus servers
+ - constructors for bus messages should probably not be OK with a NULL bus pointer