As Anders said, conffiles don't get deleted by default. Do 'dpkg -s resolvconf | grep /etc/init/', you should see that /etc/init/resolvconf.conf is marked as obsolete.
As Anders said, conffiles don't get deleted by default. resolvconf. conf is marked as obsolete.
Do 'dpkg -s resolvconf | grep /etc/init/', you should see that /etc/init/