+* kill /etc/timezone handling entirely? What does it provide?
+ - /etc/localtime carries the same information already:
+ $ ls -l /etc/localtime; cat /etc/timezone
+ lrwxrwxrwx 1 root root 33 Jul 27 09:55 /etc/localtime -> /usr/share/zoneinfo/Europe/Berlin
+ Europe/Berlin
+ - systemd enforces /usr to be available at bootup, so we can
+ enforce the use of the symlink
+