Fix webgui-redirect in system_advanced_admin
Fix webgui-redirect in system_advanced_admin

This one also seems to be wrong.
Why do people use a different name for the $POST var?
NOYB/pfsense,pfsense/pfsense,ch1c4um/pfsense,phil-davis/pfsense,jxmx/pfsense,phil-davis/pfsense,brunostein/pfsense,pfsense/pfsense,brunostein/pfsense,jxmx/pfsense,NOYB/pfsense,ch1c4um/pfsense,ptorsten/pfsense,dennypage/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,NOYB/pfsense,ptorsten/pfsense,brunostein/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,phil-davis/pfsense,ch1c4um/pfsense,pfsense/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,dennypage/pfsense,pfsense/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,dennypage/pfsense,jxmx/pfsense