DFHFCDO (file control CFDT open/close program)

When called using the FCFS parameter list, DFHFCDO performs an equivalent function for coupling facility data table opens and closes as is performed by DFHFCN for non-RLS VSAM files.

When called using the FCDS parameter list, DFHFCDO performs statistics collection for coupling facility data tables, and disconnects from CFDT pools at shutdown.