True IP for Varnish

[b00gnish]

Issue overview (quick description):

Varnish is not passing a true IP, and some sessions in Magento are being created with 127.0.0.1

Steps to reproduce issue:

1. Checking the NGINX logs for https show that the True IP is working
2. Checking the NGINX logs for http show that everything is logged as 127.0.0.1

Resulting behavior:

1. Magento is creating sessions using the 127.0.0.1

Expected behavior:

Magento sessions have the customer's True IP

Additional information (software version & running environment):

Below setting is recommended

sub vcl_recv {
  unset req.http.X-Forwarded-For;
  set req.http.X-Forwarded-For = client.ip;
}

[null93]

set req.http.X-Forwarded-For = req.http.CF-Connecting-IP;

Before return in vcl_recv solves the issue. Thanks @b00gnish