Popsu-coloque/web/sites/sites.php

<?php
$sites = array(
   'colloque2021' => 'colloque2021',
   'colloque2021.popsu.archi.fr' => 'colloque2021',
   'dev.colloque2021.popsu.archi.fr' => 'colloque2021',
   // 
   'colloque2024' => 'colloque2024',
   'colloque2024.popsu.archi.fr' => 'colloque2024',
   'dev.colloque2024.popsu.archi.fr' => 'colloque2024',
);