Update output help text

pkg/ddevapp/wordpress.go

@@ -158,7 +158,9 @@ Project ddev settings have been written to:
 
 %s
 
-Please add the following snippet to your wp-config.php file:
+Please comment out all existing database connection settings add the following
+snippet to your wp-config.php file before the include of wp-settings.php near 
+the bottom of the file:
 
 // Include for ddev-managed settings in wp-config-ddev.php.
 $ddev_settings = dirname(__FILE__) . '/wp-config-ddev.php';