add note about mailing list change
add note about mailing list change

andi-bigswitch/floodlight-oss,onebsv1/floodlight,floodlight/floodlight,rizard/floodlight,geddings/floodlight,rizard/floodlight,floodlight/floodlight,andi-bigswitch/floodlight-oss,andi-bigswitch/floodlight-oss,onebsv1/floodlight,andi-bigswitch/floodlight-oss,onebsv1/floodlight,geddings/floodlight,rizard/floodlight,floodlight/floodlight,geddings/floodlight