Older versions of the pve-firewall daemon do not restart
with HUP, so we need to do a stop/start.
--- /dev/null
+#!/bin/sh
+
+set -e
+
+case "$1" in
+ install|upgrade)
+ old_version=$2
+ if [ -e '/usr/sbin/pve-firewall' ]; then
+ if dpkg --compare-versions "$old_version" lt '1.0-16' ; then
+ echo "Detected old pve-firewall version - using stop/start to restart"
+ /usr/sbin/pve-firewall stop
+ fi
+ fi
+ ;;
+
+ abort-upgrade)
+ ;;
+
+ *)
+ echo "preinst called with unknown argument \`$1'" >&2
+ exit 1
+ ;;
+esac
+
+#DEBHELPER#
+
+exit 0