* mu4e: when moving messages, always reset the N flag

(since N (new) messages cannot have any other flags, you would loose
  e.g. the T flag when moving to trash; now, we remove the N flag, and the T
  flag remains)

lib/mu-maildir.c

@@ -707,7 +707,8 @@ mu_maildir_get_flags_from_path (const char *path)
  * /home/user/Maildir/foo/bar/new/abc  and flags == MU_FLAG_REPLIED
  *    => /home/user/Maildir/foo/bar/cur
  *
- * so only difference is whether MuFlags matches MU_FLAG_NEW is set or not
+ * so the difference is whether MuFlags matches MU_FLAG_NEW is set or
+ * not; and in the latter case, no other flags are allowed.
  *
  */
 static gchar*