Fix a theoretical/potential XSS in the http_referer check warning.
Fix a theoretical/potential XSS in the http_referer check warning.

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