Fix field type for TFTP in DHCP server settings
Fix field type for TFTP in DHCP server settings

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