ChangeLog:
- [Bug] Do not notify system users via email.
(Debian Bug#812399 by Marc Haber mh+debian-packages@zugschlus.de) - [Bug] Do no restart services in interactive restart mode while
debconf's noninteractive frontend is used.
(Debian Bug#803249 by Felix Geyer fgeyer@debian.org) - [Bug] Fix broken detection of old mappings due to regression
introduced in v2.3 (commit acf6a07).
(Debian Bug#810970 by Andreas Schmidt pi-c@arcor.de)