** The GLOBLIST argument to --exclude and --include can be a comma-separated
** list of glob patterns, where each glob pattern may optionally be enclosed
** in "..." or '...' so that it may contain commas.  If a file matches both
** --include and --exclude then it is excluded.
**
** If OUTPUTFILE is an empty string or "/dev/null" then no tarball is
** actually generated.  This feature can be used in combination with
** the --list option to get a list of the filename that would be in the
** the --list option to get a list of the filenames that would be in the
** tarball had it actually been generated.  Note that --list shows only
** filenames.  "tar tzf" shows both filesnames and subdirectory names.
**
** Options:
**   -X|--exclude GLOBLIST   Comma-separated list of GLOBs of files to exclude
**   --include GLOBLIST      Comma-separated list of GLOBs of files to include
**   -l|--list               Show archive content on stdout