Implement init script option: checkconfig.

etc/init.d/icinga2.in

@@ -103,6 +103,13 @@ reload() {
 	fi
 }
 
+# Check the Icinga 2 configuration
+checkconfig() {
+	printf "Checking configuration:"
+
+	echo "Validating the configuration file:"
+	exec $DAEMON -c $ICINGA2_CONFIG_FILE -C
+}
 
 # Print status for Icinga 2
 status() {
@@ -131,11 +138,14 @@ case "$1" in
         stop
         start
         ;;
-reload)
+  reload)
 	reload
 	;;
+  checkconfig)
+	checkconfig
+	;;
   *)
-        echo $"Usage: $0 {start|stop|restart|status}"
+        echo $"Usage: $0 {start|stop|restart|reload|checkconfig|status}"
         exit 1
 esac
 exit 0