ISSUE=8413 preventing PORT_MOD and SET_CONFIG messages

PORT_MOD and SET_CONFIG commands could affect other slices… each slice
will have to live with the settings we set in FSFW.  Since most of the
implementations we have seen don't really support these any way, this
shouldn't be a big deal
Merge branch '8413-reject-port_mod-and-set_config' into 1.0.2-dev