Thor is supplying the ip:port here, in case the filter defines a range based that include ports.
If it does not the port supplied here will be ignored.
And if nothing is supplied (as before) it uses local ip.

I guess if the Roxie host had multiple NIC's and for some reason the filter wasn't based on the default one, you might want to feed in the desired one here..
But apart from that, this change shouldn't effect Roxie.