WRAPUP 2-Hold Syrian peace talks soon, says U.N. chief

(Corrects dates of alleged chemical weapons incidents inparagraph 16. The Homs allegations date to December and theAleppo reports date to March. A previous version of this storyreversed the months of the two incidents.) * U.N. chief wants peace talks soon * Planned conference faces growing obstacles * Refugee numbers top 1.5 million. says U.N. By Darya Korsunskaya SOCHI, Russia, May 17 (Reuters ...