Backport username display feature in captive portal.  Really not sure why it wasn't included in RELENG_* versions.
Backport username display feature in captive portal.  Really not sure why it wasn't included in RELENG_* versions.

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