- do not create stage file at finalize()
* Edit /etc/network/interfaces as well if the file exists already,
we definitely need at least a loopback interface.
- * Adjust hostname in /etc/postfix/main.cf.
+ * Adjust postfix configuration:
+ - modify hostname related options in /etc/postfix/main.cf
+ - listen on loopback interface by default (thanks for suggestion, gebi)
* Unify the --bootappend option, it's not --boot_append (thanks for
the hint, Tong Sun).
* Support execution of further scripts via options --scripts and