Features:
+* move notify sockets to the file system, so that PrivateNetwork= doesn't conflict with sd_notify() usage
+
* add bus api to query unit file's X fields.
* consider adding RuntimeDirectoryUser= + RuntimeDirectoryGroup=
* support transient mount units
-* Imply DevicePolicy=closed when PrivateDevices= is used. Mount
- pts+kdbus+shm+mqueue into /dev namespace
+* Imply DevicePolicy=closed when PrivateDevices= is used
* add an "input" group to udev logic and add all input devices to it