Fix regression on general setup page preventing save with blank DNS servers
Fix regression on general setup page preventing save with blank DNS servers

Introduced in f700dc9

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