+
+ /*
+ * LIST-EXTENDED was originally going to be required by the METADATA extension.
+ * It was mercifully removed prior to the finalization of RFC5464. We started
+ * implementing this but stopped when we learned that it would not be needed.
+ * If you uncomment this declaration you are responsible for writing a lot of new
+ * code.
+ *
+ * cprintf(" LIST-EXTENDED")
+ */