The tutorial to add cron is sometimes false. Quick hack for a solution

to hide it.

htdocs/core/lib/cron.lib.php

@@ -110,6 +110,8 @@ function dol_print_cron_urls()
 	print '<br>';
 
 	// Add note
+	if (empty($conf->global->CRON_DISABLE_TUTORIAL_CRON))
+	{
     	$linuxlike=1;
     	if (preg_match('/^win/i',PHP_OS)) $linuxlike=0;
     	if (preg_match('/^mac/i',PHP_OS)) $linuxlike=0;
@@ -124,6 +126,7 @@ function dol_print_cron_urls()
     	{
     		print $langs->trans("CronExplainHowToRunWin");
     	}
+	}
 	
 	return 0;
 }