Uniformize code

htdocs/admin/barcode.php

htdocs/admin/clicktodial.php

htdocs/admin/geoipmaxmind.php

htdocs/admin/mailing.php

htdocs/admin/paybox.php

htdocs/includes/modules/modGeoIPMaxmind.class.php

htdocs/langs/ar_AR/errors.lang

htdocs/langs/ca_ES/errors.lang

htdocs/langs/da_DA/errors.lang

htdocs/langs/de_DE/errors.lang

htdocs/langs/en_US/admin.lang

htdocs/langs/en_US/errors.lang

htdocs/langs/en_US/main.lang

htdocs/langs/es_ES/errors.lang

htdocs/langs/fi_FI/errors.lang

htdocs/langs/fr_FR/admin.lang

htdocs/langs/fr_FR/errors.lang

htdocs/langs/fr_FR/main.lang

htdocs/langs/it_IT/errors.lang

htdocs/langs/nb_NO/errors.lang