properly purge remaining config files on purge

debian/postrm

@@ -0,0 +1,18 @@
+#!/bin/sh
+set -e
+
+case "$1" in
+
+    purge)
+        rm -f /opt/cis-hardening/etc/conf.d/*.cfg
+        ;;
+
+    remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
+        # nothing to do
+        ;;
+
+    *)
+        echo "$0 called with unknown argument \`$1\`'" >&2
+        exit 1
+    ;;
+esac