fix missing port, fix err log level

nginx.conf

@@ -43,8 +43,8 @@ stream {
 					 '$protocol stat:$status bs:$bytes_sent br:$bytes_received '
 					 st:'$session_time';
 	access_log access.log basic;
-	error_log error.log basic;
+	error_log error.log;
 
 	# include stream
 	include stream/*.conf;
-}
+}