{
{   This procedure  does  the  actual  adding  of  the member volume to a set.
{ Invloved in this is the actual opening of both the  member  and  the  master
{ volume  set tables, and then adding the set in the member, the member in the
{ master volume set table, and the member in the active set table.
{
{       STP$RING2_ADD_MEMBER (SET_NAME, MEMBER_VOL, MEMBER_INTERNAL_VSN,
{         MASTER_VOL, MEMBERS_AVT_INDEX, AST_ENTRY, AST_INDEX,
{         ADD_MEMBER_STATUS)
{
{ SET_NAME: (input) This parameter specifies the name  of  the  set  that  the
{       member is being added to.
{
{ MEMBER_VOL: (input) The volume that is to be added to the set.
{
{ MEMBER_INTERNAL_VSN: (input) The unique name of the new member.
{
{ MASTER_VOL: (input) The name of the master volume of the set.
{
{ MEMBERS_AVT_INDEX:  (input)  The  active  volume  table  index  for  the new
{       member.  Note this must have been gotten from device management  prior
{       to calling this request.  The member is assumed active.
{
{ AST_ENTRY: (input) The entry for the set in the active set table.
{
{ AST_INDEX: (input) The index into the active set table for the set.
{
{ STATUS: (output) This parameter returns the request status.
{
{       CONDITIONS: ste$attach_df_error
{                   ste$open_error
{                   ste$dm_avt_index_mismatch
{                   ose$mainframe_pageable_full
{
{       IDENTIFIER: stc$set_management_id
{
