+/**
+ * Adds Dtk data to the list.
+ *
+ * The dtk_bytes buffer passed in must contain exactly DTK_SIZE (16) bytes of
+ * data. It doen't have to be null terminated.
+ *
+ * @param data The current list to operate on.
+ * @param dtk_bytes The DTK value to add, in binary format.
+ * @param day_number The day number to associate with the DTK.
+ */