Show a warning in the installer if .htaccess is not working

lib/setup.php

@@ -6,6 +6,12 @@ $hasPostgreSQL = is_callable('pg_connect');
 $hasOracle = is_callable('oci_connect');
 $datadir = OC_Config::getValue('datadirectory', OC::$SERVERROOT.'/data');
 
+// Test if  .htaccess is working
+$content = "<Directory /data>\n";
+$content.= "Deny from All\n";
+$content.= "</Directory>";
+file_put_contents(OC::$SERVERROOT.'/data/.htaccess', $content);
+
 $opts = array(
 	'hasSQLite' => $hasSQLite,
 	'hasMySQL' => $hasMySQL,
@@ -13,6 +19,7 @@ $opts = array(
 	'hasOracle' => $hasOracle,
 	'directory' => $datadir,
 	'secureRNG' => OC_Util::secureRNG_available(),
+	'htaccessWorking' => OC_Util::ishtaccessworking(),
 	'errors' => array(),
 );