forgot to uncomment FD_ZERO
forgot to uncomment FD_ZERO

drat/slowhttptest,michalkoczwara/slowhttptest,erikdejonge/slowhttptest,drat/slowhttptest,blu3sh3ll/slowhttptest,rodrigoac/slowhttptest,shekyan/slowhttptest,erikdejonge/slowhttptest,shekyan/slowhttptest,blu3sh3ll/slowhttptest,rodrigoac/slowhttptest,michalkoczwara/slowhttptest