$response = $wgRequest->response();
$response->header( "Content-type: $ctype" );
-// Set an Expires header so that squid can cache it for a short time
+// Set an Expires header so that CDN can cache it for a short time
// Short enough so that the sysadmin barely notices when $wgSitename is changed
$expiryTime = 600; # 10 minutes
$response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + $expiryTime ) . ' GMT' );