Merge remote-tracking branch 'upstream/3.9' into 3.9

htdocs/admin/ihm.php

htdocs/commande/list.php

htdocs/core/class/commonobject.class.php

htdocs/core/class/extrafields.class.php

htdocs/core/db/pgsql.class.php

htdocs/core/lib/functions2.lib.php

htdocs/core/modules/barcode/mod_barcode_product_standard.php

htdocs/core/modules/barcode/modules_barcode.class.php

htdocs/cron/class/cronjob.class.php

htdocs/install/pgsql/functions/functions.sql

htdocs/product/class/product.class.php

htdocs/product/stock/product.php

htdocs/resource/class/resource.class.php

test/phpunit/Functions2LibTest.php