static void.
(print_version): New function.
(longopts): Added longopts for all options.
(main): Accommodate changes in usage function and new version option.
(groupname): Ditto.
(usage): Ditto. Add more user friendly help text.
(main): Add -n and --help option. Print names instead of IDs
unless -n option is given.
* setfacl.c (getperm): Tolerate whitespace and comment chars in input.
(getaclentry): Fix several input string misdetections.
(getaclentries): Allow - as input file name to read from stdin.
Tolerate whitespace and comment chars in input.
(usage): Add more user friendly help text.
(main): Add --help option.
