Fix require_once instead of require.

htdocs/commande/card.php

htdocs/core/lib/files.lib.php

htdocs/core/lib/functions.lib.php

htdocs/core/modules/DolibarrModules.class.php

htdocs/ecm/ajax/ecmdatabase.php

htdocs/expedition/index.php

htdocs/fourn/commande/card.php

htdocs/fourn/paiement/info.php

htdocs/holiday/common.inc.php

htdocs/product/ajax/products.php

htdocs/societe/ajax/company.php

htdocs/user/card.php