Features:
+* tmpfiles: add support for "+" suffix for more commands
+
+* support empty /etc boots nicely:
+ - apply presets at first boot
+ - tmpfiles: allow overriding of /etc/mtab
+ - tmpfiles: add nice way to copy files /usr/share/etc → /etc
+
* generator that automatically discovers btrfs subvolumes, identifies their purpose based on some xattr on them.
* support setting empty environment variables with Environment= and EnvironmentFile=