GLOBAL MARKETS-Nasdaq breaks 15-yr record; oil up on Middle East worry

* Nasdaq tops 15-yr closing record * European shares slide after soft PMIs * Oil rises on Middle East concern * Energy shares, earnings lift U.S. stocks (Adds close of U.S. markets, oil settlement prices) By Chuck Mikolajczak NEW YORK, April 23 (Reuters) - U.S. stocks rose on Thursday, with the Nasdaq index hitting a record closing high, as corporate earnings and a rise in energy shares overshadowed soft U.S. economic data, while oil prices climbed to the highest levels of