Release Notes: Support for kdbus has been added. Two new tools, systemd-networkd and systemd-socket-proxyd, have been added. Several libraries have been combined into a single libsystemd to reduce code duplication.
Release Notes: This release introduced a number of major new concepts such as transient units, and scope and slice units. The systemd binary now does all cgroup management.
Release Notes: This release has support for structured log messages from /dev/kmsg, and removes support for classic /proc/kmsg for the journal. Journal files now also support Forward Secure Sealing. The fstab code now handles PARTUUID= and PARTLABEL= entries.