Qual: Move a not frequently used function out of functions.lib.php

htdocs/cashdesk/validation_verif.php

htdocs/comm/action/fiche.php

htdocs/comm/action/index.php

htdocs/contact/class/contact.class.php

htdocs/core/lib/date.lib.php

htdocs/core/lib/functions.lib.php

htdocs/core/modules/export/export_excel.modules.php

htdocs/core/modules/export/export_excel2007.modules.php

htdocs/main.inc.php

scripts/invoices/rebuild_merge_pdf.php

test/phpunit/DateLibTest.php