Wip chunked decoding

+ Need to test normal body parsing
+ path_is_valid() renamed eval_file_type()
+ replaced atoi with strtol/strtoul

srcs/webserv/run_loop.cpp

@@ -20,8 +20,9 @@ void	Webserv::run()
 		nfds = ::epoll_wait(_epfd, events, MAX_EVENTS, TIMEOUT);
 		if (nfds == -1)
 		{
+			int errno_copy = errno;
 			std::perror("err epoll_wait()");
-			if (errno == EINTR)
+			if (errno_copy == EINTR)
 				g_run = false;
 			else
 				throw std::runtime_error("Epoll wait");