default and custom error pages response

+ refactoring in response.cpp (functions split)
+ added Client::clear()
+ added replace_all_substr() in utils.cpp

srcs/webserv/init.cpp

@@ -76,3 +76,15 @@ void	Webserv::_listen(int socket_fd, unsigned int max_connections)
 		throw std::runtime_error("Socket listen");
 	}
 }
+
+void	Webserv::_init_http_status_map()
+{
+	_http_status[200] = S200;
+
+	_http_status[400] = S400;
+	_http_status[404] = S404;
+	_http_status[405] = S405;
+	_http_status[413] = S413;
+
+	_http_status[500] = S500;
+}