+ /*
+ * Compatibility: Prior to 0.5.5 it was necessary to specify
+ * the listing mode without the '=' character as in -lv, for
+ * example. Now the variant with '=' is preferred and
+ * documented but we still accept the old way to specify the
+ * listing mode.
+ *
+ * Support for the legacy syntax can be dropped at 0.6.0
+ * or later.
+ */