Add script for restart hooks

restart-hook

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+for UNITFILE in ${1}; do
+  if /usr/bin/systemctl is-active --quiet "${UNITFILE}"; then
+    /usr/bin/systemctl restart "${UNITFILE}"
+  else
+    echo >&2 "  Skipped: ${UNITFILE} not active"
+  fi
+done