generates 20 bytes of storage to contain the addresses of the
CPRB and CED (8 bytes) and the define server parameter area (12 bytes).
The DEFSERV macro fills in this storage. The label on this statement
must match the DEFSERV plist name used in the
MF keyword of the execute form of the macro.
Note: If the
issuing program is reentrant, it must use the GETMAIN macro to allocate
the 20 bytes of storage, and the FREEMAIN macro to release the storage
when finished processing.