Introspection, queue-state properties, immediate and bus-first
settle, Info by devpath, Trigger(add, net) observed via the
DeviceProcessed signal, and RulesReload -- driven by dummy interface
hotplug like keventd.sh. New call-ss and call-u client modes, and
getprop learns the b and t variants.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
