Add $CELERYCTL_OPTS variables to allow adding --config argument when running celeryd with a Django settings file.

contrib/generic-init.d/celeryd

@@ -126,7 +126,7 @@ case "$1" in
     ;;
 
     status)
-        $CELERYCTL status
+        $CELERYCTL status $CELERYCTL_OPTS
     ;;
 
     restart)