GLOBAL MARKETS-Shares rally as Fed meeting nears, dollar firms

* Equities gain worldwide; Nikkei leaps 2.7 pct * Dollar recovers vs yen, near lows against major currencies * Oil trims gains even as Syria standoff looms By Herbert Lash NEW YORK, June 17 (Reuters) - Global equity markets rose and the dollar strengthened against the yen on Monday on expectations the Federal Reserve will reinforce its commitment this week to supporting the U.S. economic recovery. But U.S. stocks pared gains late in the session as confidence eroded that the