Features:
+* introduce generic AUGMENT_PID=, AUGMENT_DEVICE= fields
+
+* deal with sendmail/postfix exclusivity
+
+* systemctl enable: improve the success messages
+
+* systemctl enable: fail if target to alias into doesn't exist? maybe show how many units are enabled afterwards?
+
* on shutdown: move utmp, wall, audit logic all into PID 1 itsel
* add "provisioning" instructions to setup an empty /etc + /var