fix mgr under py3
fix mgr under py3

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