MPFLSTxx parameters for managing foreign messages

.FORNSSI
.FORNSSI indicates the beginning of a statement that defines the attributes for handling foreign messages.
*ALL
Indicates that all subsystems are to receive foreign messages and DOMs.
*NONE
Indicates that no subsystems are to receive foreign messages and DOMs.
NOCHANGE
Indicates that the system are to retain the previous .FORNSSI statement.
(list of subsystems)
Indicates one or more subsystems that are to receive foreign messages and DOMs. Subsystems not in this list do not receive foreign messages and DOMs.