In my system, `libpam-runtime/override` is set to `false` (which I can see using `debconf-get-selections`).

Why when upgrading the system, specifically libpam-systemd, dpkg still pops up the window "Override local changes to /etc/pam.d/common-\*?"? Should I preseed some other value? I can't find any.

The machine is an Ubuntu 14.04 server.