Fix doc

htdocs/custom/README.md

@@ -14,8 +14,8 @@ Then create the symbolic link
 ln -fs ~/git/newmodule/htdocs /path_to_dolibarr/htdocs/custom/newmodule 
 
 WARNING !!!
-Check also that the custom directory into dolibarr conf/conf.php file by adding the following 
-two lines, so dolibarr will also scan this directories to find external external modules:
+Check also that the /custom directory is active by adding into dolibarr conf/conf.php file the following 
+two lines, so dolibarr will also scan /custom directory to find external external modules:
 
 $dolibarr_main_url_root_alt='/custom';
 $dolibarr_main_document_root_alt='/path_to_dolibarr/htdocs/custom/';