{     This request dynamically expands a segment containing a FORTRAN common
{ block, returns a pointer to the expanded area, and sets the end of
{ information
{ to include the expanded area.  The segment is also given the attribute
{ "extensible" so that any subsequent loads of programs will not use the
{ segment.
{
{      PMP$EXPAND_SEGMENT (PVA, LENGTH, STARTING_PVA, STATUS)
{
{    PVA: (input) This parameter specifies an address residing in the segment.
{
{    LENGTH: (input) This parameter specifies the number of bytes to expand
{       the segment.
{
{    STARTING_PVA: (output) This parameter specifies the starting address of
{       the expanded area.
{
{    STATUS: (output) This parameter specifies the request status.
{         CONDITIONS:
{               lle$program_segment_overflow
{               pme$common_block_not_defined
