Rewriting postinst with the standard maintainer script.

Signed-off-by: Daniel Baumann <daniel@debian.org>

debian/nvme-cli.postinst

@@ -2,14 +2,29 @@
 
 set -e
 
-if [ "$1" = "configure" ]; then
-    if [ ! -s /etc/nvme/hostnqn ]; then
+case "${1}" in
+	configure)
+		if [ ! -s /etc/nvme/hostnqn ]
+		then
 			nvme gen-hostnqn > /etc/nvme/hostnqn
 		fi
 
-    if [ ! -s /etc/nvme/hostid ]; then
+		if [ ! -s /etc/nvme/hostid ]
+		then
 			uuidgen > /etc/nvme/hostid
 		fi
-fi
+		;;
+
+	abort-upgrade|abort-remove|abort-deconfigure)
+
+		;;
+
+	*)
+		echo "postinst called with unknown argument \`${1}'" >&2
+		exit 1
+		;;
+esac
 
 #DEBHELPER#
+
+exit 0