Test daemon running state the systemd way

src/freedombone-utils-watchdog

@@ -54,7 +54,7 @@ function add_watchdog_daemon {
 
     echo '' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
     echo "# keep ${daemon_name} daemon running" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
-    echo "RUNNING=\$(pgrep ${daemon_name} > /dev/null && echo Running)" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
+    echo "RUNNING=\$(systemctl is-active ${daemon_name} >/dev/null 2>&1 && echo Running)" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
     echo 'if [ ! $RUNNING ]; then' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
     echo "  systemctl start ${daemon_name}" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
     echo '  echo -n $CURRENT_DATE >> $LOGFILE' >> /usr/bin/$WATCHDOG_SCRIPT_NAME