Bug#968589: Need to restart internet connections upon upgrade, else no names can be resolved

[積丹尼 Dan Jacobson]

But I purged resolvconf many reboots ago!
Now whenever I upgrade systemd, I have to restart ppp (not reboot)
to get the systemd resolver working again.
Not sure if it had to do with me removing resolvconf though,
or some recent change in systemd....