TODO

   1 1.      Make dump honor the no-dump attribute on directories.  Currently, it
   2         honours it only on files.  This means that a directory flagged with
   3         the no-dump attribute will be dumped if it contains a file without
   4         the no-dump flag.
   5
   6 2.      Make dump able to backup several directories and/or files in one
   7         invocation, like the SunOS version.