Acceptor listen(Supervisor owner, Spec spec) throws ListenFailedException {
        return new Acceptor(this, owner, spec);
    }
Listens to the given address. This method is called by a {@link
Supervisor} object.

@return active object accepting new connections
@param owner the one calling this method
@param spec the address to listen to
jrt/src/com/yahoo/jrt/Transport.java