docs on using reverse proxy / load balancers#689

bryannielsen merged 4 commits intorelease/7.4.0ExpressionEngine/ExpressionEngine-User-Guide:release/7.4.0from

feature/7.x/get-ip-behind-load-balancerExpressionEngine/ExpressionEngine-User-Guide:feature/7.x/get-ip-behind-load-balancerCopy head branch name to clipboard