Merge pull request #4976 from Dolibarr/scrutinizer-patch-2

htdocs/core/class/commonobject.class.php

htdocs/core/class/fileupload.class.php

htdocs/core/class/hookmanager.class.php

htdocs/core/class/html.form.class.php

htdocs/core/lib/functions2.lib.php

htdocs/holiday/class/holiday.class.php

htdocs/livraison/class/livraison.class.php

htdocs/societe/class/api_contact.class.php

htdocs/societe/class/api_thirdparty.class.php