GLOBAL MARKETS-Euro edges higher, stocks sag before ECB meeting

* Euro nudges up, eyes ECB meeting after report of internal rift* European stocks drop 0.4 percent after recent big gains* Dollar rally eases, commodities remain under pressure* EM, commodity-linked currencies strainedBy Marc JonesLONDON, Nov 6 (Reuters) - The euro edged higher and European stocks pulled back on Thursday as investors waited to see what message ECB chief Mario Draghi will send afte