The SYSEXT_LEVEL= field in os-release(5) may be used to specify the
supported system extension level.
+ * A new ExtensionImages= unit setting can be used to apply the same
+ system extension image concept from systemd-sysext to the namespaced
+ file hierarchy of specific services, following the same rules and
+ constraints.
+
* A new configuration file /etc/veritytab may be used to configure
dm-verity integrity protection for block devices. Each line is in the
format "volume-name data-device hash-device roothash options",