When we receive an AUTH or ASSOC event even though we have already

When we receive an AUTH or ASSOC event even though we have already
reached the RUN state, this probably means that we have roamed to
a different AP.  In that case throw us back into SCAN mode and let
the stack look for a new AP to connect to.  In the future it might
be worthwhile to use the ROAM event information to read the new AP
information to adjust our stack, but that is further down the road.