Fix logout missing csrf token

See https://forum.dokuwiki.org/d/20248-security-token-did-not-match-possible-csrf-attack-cannot-log-out/8

dokuwiki/lib/tpl/phpnet/main.php

@@ -33,7 +33,7 @@ if (empty($_SERVER['REMOTE_USER'])) {
     $LINKS = array(
         array("href" => "?do=edit",     "text" => "Edit this page",),
         array("href" => "?do=admin",    "text" => "Admin",),
-        array("href" => "?do=logout",   "text" => "Logout",),
+        array("href" => "?do=logout&sectok=" . urlencode(getSecurityToken()), "text" => "Logout",),
         array("href" => "?do=profile",  "text" => $name,),
     );
 }