older systemd versions, however systemd continues to accept TPM-sealed
credentials that were created before this change.
+ * The legacy socket for controlling systemd-udevd has been removed, and
+ udevadm now unconditionally uses Varlink IPC. The legacy UNIX socket
+ /run/udev/control, which is sometimes used to check whether udevd is
+ running, has been replaced with a symlink to the Varlink socket. This
+ change does not mean the legacy protocol is supported on this path;
+ rather, the symlink is maintained to ensure the socket is bound under
+ the same conditions as before.
+
Changes in the system and service manager:
* The manager now embeds a basic set of unit files (basic.target,