* mkgroup.c (main): Change call to exit() to a return statement.

	* mkgroup.c (main): Change call to exit() to a return statement.
	* mkpasswd.c (main): Ditto.

	* mkpasswd.c (usage): Simplify usage output.  Generalize to allow use
	for help. Correct '?' typo to 'h'.
	(longopts): Add version option.
	(opts): Add 'v' version option.
	(print_version): New function.
	(main): Accommodate new version option.  Accommodate usage parameter
	changes.