make with no-use warning #62

Hi @etr
Thanks for your work! I have a question.
In class http_request define, this code "
void set_digested_user(const std::string& user)
{
this->digested_user = digested_user;
}
" should be "
void set_digested_user(const std::string& digested_user)
{
this->digested_user = digested_user;
}
" ?
Thanks.