*
* Specifically, for each filename corresponding to this message:
*
- * Rename the file so that its filename ends with the sequence ":2,"
- * followed by zero or more of the following single-character flags
- * (in ASCII order):
+ * If the filename is not in a maildir directory, do nothing. (A
+ * maildir directory is determined as a directory named "new" or
+ * "cur".) Similarly, if the filename has invalid maildir info,
+ * (repeated or outof-ASCII-order flag characters after ":2,"), then
+ * do nothing.
+ *
+ * If the filename is in a maildir directory, rename the file so that
+ * its filename ends with the sequence ":2," followed by zero or more
+ * of the following single-character flags (in ASCII order):
*
* 'D' iff the message has the "draft" tag
* 'F' iff the message has the "flagged" tag
* 'R' iff the message has the "replied" tag
* 'S' iff the message does not have the "unread" tag
*
- * Warning: any existing flags unmentioned in the list above will be
- * removed by this renaming.
+ * Any existing flags unmentioned in the list above will be preserved
+ * in the renaming.
*
* Also, if this filename is in a directory named "new", rename it to
* be within the neighboring directory named "cur".