Function - Move the specified receive right into or out of the
specified port set.
[in task send right] The task holding the port set and receive right.
[in scalar] The task's name for the receive right.
[in scalar] The task's name for the port set.
The mach_port_move_member function moves a receive right into a
port set. If the receive right is already a member of any other port sets,
it is removed from those sets first. If the port set is MACH_PORT_NULL,
then the receive right is not put into a port set, but removed from all
its current port sets.
This interface is machine word length specific because of the port name
member or after did not denote a right.
member denoted a right, but not a receive right, or after
denoted a right, but not a port set.
after was MACH_PORT_NULL, but member wasn't currently
in a port set.