Displays the content of the allocated memory list.  Memory
   blocks which are allocated using a personal vector will appear
   with an asterisk (*) after the address of the MALLOC_HDR.  If
   /HISTORY is used, then all memory allocations and deallocations
   are displayed.

   Format:

     TCPIP SHOW MEMORY
         /ALL
         /BACKWARDS
         /COMMAND
         /DATA
         /HISTORY
         /ORDERED
         /PC
         /SUMMARY
         /TYPES