Features:
+* socket units: allow creating a udev monitor socket with ListenDevices= or so,
+ with matches, then actviate app thorugh that passing socket oveer
+
* coredump: maybe when coredumping read a new xattr from /proc/$PID/exe that
may be used to mark a whole binary as non-coredumpable. Would fix:
https://bugs.freedesktop.org/show_bug.cgi?id=69447
* tmpfiles:
- apply "x" on "D" too (see patch from William Douglas)
- - replace F with f+.
- instead of ignoring unknown fields, reject them.
- creating new directories/subvolumes/fifos/device nodes
should not follow symlinks. None of the other adjustment or creation