Update common.py
Update common.py

https://github.com/mengskysama/shadowsocks-rm/issues/4
michalliu/shadowsocks,liamchzh/shadowsocks,warmchang/shadowsocks,orvice/shadowsocks,liamchzh/shadowsocks,shell909090/shadowsocks,taoger/shadowsocks,gitchs/shadowsocks,shenfei/shadowsocks,magic282/shadowsocks,michaelhe/shadowsocks,falseen/shadowsocks,NanaLich/shadowsocks,plus1s/shadowsocks-py-mu,pobizhe/shadowsocks,magic282/shadowsocks,kigawas/shadowsocks,EvilCult/shadowsocks,plus1s/shadowsocks-py-mu,falseen/shadowsocks,CasparLi/shadowsocks,kigawas/shadowsocks-learning,otoil/shadowsocks,NanaLich/shadowsocks,kigawas/shadowsocks,catinred2/shadowsocks,wesley1001/shadowsocks,vanish87/shadowsocks,hjhjw1991/shadowsocks,kimw/shadowsocks,warmchang/shadowsocks,Rand01ph/shadowsocks,ufownl/shadowsocks,xjz19901211/shadowsocks,crvv/shadowsocks,bbiao/shadowsocks,crazygold/shadowsocks-rm,hellofwy/shadowsocks,crvv/shadowsocks,bbiao/shadowsocks,lasting-yang/shadowsocks,hellofwy/shadowsocks,Licshee/shadowsocks,EvilCult/shadowsocks,kimw/shadowsocks,michalliu/shadowsocks,gitchs/shadowsocks,shell909090/shadowsocks,babykiss4ever/shadowsocks,crazygold/shadowsocks-rm,kcyeu/shadowsocks,michaelhe/shadowsocks,ufownl/shadowsocks,wesley1001/shadowsocks,Licshee/shadowsocks,babykiss4ever/shadowsocks,bwinhwang/shadowsocks,taoger/shadowsocks,orvice/shadowsocks,Rand01ph/shadowsocks,hjhjw1991/shadowsocks,kigawas/shadowsocks-learning,CasparLi/shadowsocks,shenfei/shadowsocks,otoil/shadowsocks,xjz19901211/shadowsocks,kcyeu/shadowsocks,mengskysama/shadowsocks-rm,lasting-yang/shadowsocks,mengskysama/shadowsocks-rm,fengyie007/shadowsocks,vanish87/shadowsocks,bwinhwang/shadowsocks,pobizhe/shadowsocks,fengyie007/shadowsocks,catinred2/shadowsocks