GLOBAL MARKETS-Equities extend rally, oil rebounds

(Updates to open of U.S. markets, adds dateline; previous LONDON)* ECB questions sour European shares after 3-day rally* Wall St rises 0.25 percent in opening deals* BOJ sticks with bond buying, ECB creeping closer to QE* Rouble bounces over 3 percent, oil above $60 a barrelBy Marc Jones and David GaffenLONDON/NEW YORK, Dec 19 (Reuters) - Equity markets worldwide extended the week&aposs rally on F