Client initiated multiplex RMI socket connectivity disabled in JDK 1.2.2

The use of client-initiated multiplexed RMI sockets in JDK 1.2.2 using the
"simulateApplet" property appears to have been disabled in JDK 1.2.2.

This severely impacts the Sun Remote Services project as we have a requirement
to perform RMI through NAT firewalls.

This worked fine in all releases up to 1.2.2.

We need to use JDK 1.2.2 for performance (and bugfix) reasons, so dropping
back to 1.2.1 is not an option.