config is in openssh-server 1:6.6p1-2ubuntu2.13.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #! /bin/sh
set -e
. /usr/share/debconf/confmodule
db_version 2.0
get_config_option() {
	option="$1"
	[ -f /etc/ssh/sshd_config ] || return
	# TODO: actually only one '=' allowed after option
	perl -ne 'print if s/^[[:space:]]*'"$option"'[[:space:]=]+//i' \
	   /etc/ssh/sshd_config 2>/dev/null
}
if dpkg --compare-versions "$2" lt-nl 1:6.6p1-1 && \
   [ "$(get_config_option PermitRootLogin)" = yes ]; then
	if [ "$(getent shadow root | cut -d: -f2)" = "!" ]; then
		db_set openssh-server/permit-root-login true
	else
		db_input high openssh-server/permit-root-login || true
		db_go
	fi
fi
exit 0
 |