$a->page['htmlhead'] .= '<link rel="lrdd" type="application/xrd+xml" href="' . System::baseUrl() . '/xrd/?uri=' . $uri . '" />' . "\r\n";
header('Link: <' . System::baseUrl() . '/xrd/?uri=' . $uri . '>; rel="lrdd"; type="application/xrd+xml"', false);
$a->page['htmlhead'] .= '<link rel="lrdd" type="application/xrd+xml" href="' . System::baseUrl() . '/xrd/?uri=' . $uri . '" />' . "\r\n";
header('Link: <' . System::baseUrl() . '/xrd/?uri=' . $uri . '>; rel="lrdd"; type="application/xrd+xml"', false);