Use MD_STD_SEC's anti CSRF functions

public/index3.php

@@ -381,6 +381,7 @@ function get_duplicates(array $array):array {
 if ($error + $depcon_error > 0) {
     echo '
     <p>Error(s) found: ' . ($error + $depcon_error) . '</p>';
+    echo '<a href="index6.php?fnam=' . htmlspecialchars($_GET['fnam']) . '" class="buttonLike">Create XML for md:import (utf8)</a><br>';
 }
 else {
     echo '<a href="index6.php?fnam=' . htmlspecialchars($_GET['fnam']) . '" class="buttonLike">Create XML for md:import (utf8)</a><br>';