vgroup_id	IN:	Vgroup identifier returned by Vattach
	vgroup_name	IN:	Name of a vgroup

	Purpose	Sets the name of a vgroup.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	Vsetname sets the name specified by the parameter vgroup_name for the vgroup identified by the parameter vgroup_id.
		A vgroup initially has a name of NULL, and may be renamed more than once during the scope of the vgroup identifier (vgroup_id). Note that the routine does not check for uniqueness of vgroup names.
		Vgroup names are optional, but recommended. They serve as meaningful labels for user applications. If used, they should be unique. The name length is limited to VSNAMELENMAX (or 64) characters.

	FORTRAN	integer function vfsnam(vgroup_id, vgroup_name)
		integer vgroup_id
		character*(*) vgroup_name