Fix u2f with nginx rp

data/web/u2f_api.php

@@ -3,8 +3,7 @@ require_once('inc/prerequisites.inc.php');
 $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
 $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
 
-$scheme = isset($_SERVER['HTTPS']) ? "https://" : "http://";
-$u2f = new u2flib_server\U2F($scheme . $_SERVER['HTTP_HOST']);
+$u2f = new u2flib_server\U2F('https://' . $_SERVER['HTTP_HOST']);
 
 function getRegs($username) {
   global $pdo;
@@ -154,4 +153,4 @@ Action: <br />
 }
 ?>
 </body>
-</html>
+</html>