added timeout response (status 408)

+ added EPOLLERR and EPOLLHUP handling
+ fix root substitution for default "/" location (temp or permanent ?)
+ tested siege a little, seems good

srcs/webserv/request.cpp

@@ -26,6 +26,7 @@ void	Webserv::_request(Client *client)
 	else if (ret == READ_COMPLETE)
 	{
 		_epoll_update(client->get_cl_fd(), EPOLLOUT, EPOLL_CTL_MOD);
+		client->request_complete = true;
 	}
 }