fix bug under py3
fix bug under py3

loveward/yingsuo,miyouzi/ch-docker-ssr,miyouzi/ch-docker-ssr,loveward/yingsuo,ZeroClover/shadowsocksr,shadowsocksr-backup/shadowsocksr,shadowsocksr-backup/shadowsocksr,monokoo/shadowsocks,monokoo/shadowsocks,shadowsocksR-private/shadowsocksR,shadowsocksR-private/shadowsocksR