Merge pull request #37 from relrod/php82-fix

Fix `DISTRIBUTION` constant check for PHP 8.x

Author: dg9vh

include/tools.php

@@ -66,7 +66,7 @@ function createConfigLines() {
 function checkSetup() {
    $el = error_reporting();
    error_reporting(E_ERROR | E_WARNING | E_PARSE);
-   if (defined(DISTRIBUTION)) {
+   if (defined("DISTRIBUTION")) {
 ?>
 <div class="alert alert-danger" role="alert"><?php echo _("You are using an old config.php. Please configure your Dashboard by calling <a href=\"setup.php\">setup.php</a>!"); ?></div>
 <?php
@@ -85,4 +85,4 @@ function convertTimezone($timestamp) {
    $date->setTimezone(new DateTimeZone(TIMEZONE));   
    return $date->format('Y-m-d H:i:s');
 }
-?>
+?>