proxy: 'transparent' also sets X-Forwarded-For (closes #924)
proxy: 'transparent' also sets X-Forwarded-For (closes #924)

dusty/caddy,captncraig/caddy,elcore/caddy,dusty/caddy,tobya/caddy,pedronasser/caddy,cez81/caddy,yukimochi/caddy,pyed/caddy,joshix/caddy,tobya/caddy,tw4452852/caddy,tobya/caddy,tw4452852/caddy,devangels/caddy,pyed/caddy,DenBeke/caddy,tw4452852/caddy,captncraig/caddy,dusty/caddy,devangels/caddy,pedronasser/caddy,dusty/caddy,yukimochi/caddy,joshix/caddy,DenBeke/caddy,DenBeke/caddy,devangels/caddy,elcore/caddy,captncraig/caddy,ollie314/caddy,tw4452852/caddy,pyed/caddy,yukimochi/caddy,cez81/caddy,ollie314/caddy,elcore/caddy,pedronasser/caddy,tobya/caddy,pedronasser/caddy,ollie314/caddy,pyed/caddy,ollie314/caddy,cez81/caddy,DenBeke/caddy,joshix/caddy