file_id	IN:	File identifier returned by Hopen
	major_v	OUT:	Major version number
	minor_v	OUT:	Minor version number
	release	OUT:	Release number
	string	OUT:	Version number text string

	Purpose	Retrieves version information for an HDF file.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	It is still an open question as to what exactly the version number of a file should mean, so we recommend that code not depend on this buffer. The string argument is limited to a length of LIBVSTR_LEN (or 80) characters as defined in hfile.h.

	FORTRAN	integer function hgfilver(file_id, major_v, minor_v, release, string)
		integer file_id, major_v, minor_v, release
		character*(*) string