gettext() fixes on diag_backup.php
gettext() fixes on diag_backup.php

pfsense/pfsense,jxmx/pfsense,brunostein/pfsense,ptorsten/pfsense,ch1c4um/pfsense,brunostein/pfsense,dennypage/pfsense,pfsense/pfsense,phil-davis/pfsense,pfsense/pfsense,ch1c4um/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,phil-davis/pfsense,jxmx/pfsense,ptorsten/pfsense,brunostein/pfsense,dennypage/pfsense,NOYB/pfsense,NOYB/pfsense,dennypage/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,dennypage/pfsense,pfsense/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,NOYB/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense