* "systemctl edit" has been updated to show the original effective unit
contents in commented form in the text editor.
+ * Units in user mode are now segregated into three new slices:
+ session.slice (units that form the core of graphical session),
+ app.slice ("normal" user applications), and background.slice
+ (low-priority tasks). Unless otherwise configured, user units are
+ placed in app.slice. The plan is to add resource limits and
+ protections for the different slices in the future.
+
Contributions from: Adolfo Jayme Barrientos, afg, Alec Moskvin, Alyssa
Ross, Amitanand Chikorde, Andrew Hangsleben, Anita Zhang, Ansgar
Burchardt, Arian van Putten, Aurelien Jarno, Axel Rasmussen, bauen1,