Add note about authentication options url -> urlroot change
Add note about authentication options url -> urlroot change

morray/iD,digidem/iD,kartta-labs/iD,bagage/iD,1ec5/iD,edpop/iD,morray/iD,edpop/iD,mapmeld/iD,digidem/iD,ngageoint/hootenanny-ui,openstreetmap/iD,AndreasHae/iD,AndreasHae/iD,bagage/iD,mapmeld/iD,mapmeld/iD,openstreetmap/iD,kartta-labs/iD,bagage/iD,edpop/iD,AndreasHae/iD,kartta-labs/iD,ngageoint/hootenanny-ui,openstreetmap/iD,1ec5/iD,1ec5/iD,ngageoint/hootenanny-ui