/**
  * Update a user with admin rights and return it
  * @param AJXP_User $adminUser
  * @return AJXP_User
  */
 static function updateAdminRights($adminUser)
 {
     foreach (array_keys(ConfService::getRootDirsList()) as $rootDirIndex) {
         $adminUser->setRight($rootDirIndex, "rw");
     }
     $adminUser->save();
     return $adminUser;
 }