+* generator that automatically discovers btrfs subvolumes, identifies their purpose based on some xattr on them.
+
+* support setting empty environment variables with Environment= and EnvironmentFile=
+
+* tmpfiles: figure out relation between Z and m?
+
+* systemd-notify: fake ucred of msg to PID of parent, if that works, with fallback to our own if it doesn't.
+
+* machined/machinectl: sort IP addresses we return by scope and protocol
+* machined: write NSS module for looking up IP addresses for machines
+
+* timer units: actually add extra delays to timer units with high AccuracySec values, don't start them already when we are awake...
+
+* timesyncd:
+ - hookup with networkd: NTP servers from dhcp
+
+* a way for container managers to turn off getty starting via $container_headless= or so...
+
+* figure out a nice way how we can let the admin know what child/sibling unit causes cgroup membership for a specific unit
+
+* add a kernel command line option to enable the debug shell
+