fix hex case sensitive bug in ed2k hash check
fix hex case sensitive bug in ed2k hash check

sndnvaps/xunlei-lixian,wangjun/xunlei-lixian,GeassDB/xunlei-lixian,liujianpc/xunlei-lixian,myself659/xunlei-lixian,iambus/xunlei-lixian,sdgdsffdsfff/xunlei-lixian,wogong/xunlei-lixian,xieyanhao/xunlei-lixian,ccagg/xunlei,davies/xunlei-lixian,windygu/xunlei-lixian