UPDATE 4-Dutch Rabobank quits cycling after Armstrong scandal

* Biggest sponsor of Dutch cycling pulls out * Cites drug scandals as reason for the decision * Move follows USADA report on Armstrong doping scandal * Britain’s Millar says bank decision is “sickening” AMSTERDAM, Oct 19 (Reuters) – Dutch bank Rabobank ended its multi-million euro backing of professional cycling on Friday, the latest sponsor scared away by a doping scandal that has engulfed seven-times Tour de France winner Lance Armstrong. …