In r207768 I silenced a console warning from rum(4).  There was legitimate opposition to the change, since really we need to implement missing functionality in drivers or the 802.3 layer.
In r207768 I silenced a console warning from rum(4).  There was legitimate
opposition to the change, since really we need to implement missing
functionality in drivers or the 802.3 layer.

For now, restore a reminder message for a missing rum_update_mcast, but
print it only once.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase