setSelectorAtBroker procedure

Since the SonicMQ Broker typically runs on a machine with more resources than the machine running the SonicMQ client, it is desirable to have the SonicMQ Broker provide this filtering instead of the SonicMQ client.

SonicMQ messages can be filtered so that only those meeting a specific criteria will be received. For point-to-point sessions, this filtering is always done by the SonicMQ Broker. For publish/subscribe sessions, this filtering is done by the SonicMQ client by default.

This procedure must be called before beginSessionprocedure .