more pretty arguments handling. print default values in usage
more pretty arguments handling. print default values in usage

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