* allow implementation of InaccessibleDirectories=/ plus
ReadOnlyDirectories=... for whitelisting files for a service.
-* libsystemd-bus:
+* sd-bus:
+ - let the activator peek the peer connection with KDBUS_CMD_MSG_SRC and log it
- when kdbus doesn't take our message without memfds, try again with memfds
- implement monitor logic
- see if we can drop more message validation on the sending side