Extract the first IP from HTTP_X_FORWARDED_FOR  and HTTP_CLIENT_IP and HTTP_CF_CONNECTING_IP and HTTP_X_FORWARDED_HOST when there is more than one IP (#10404)

* Extract the first IP from HTTP_X_FORWARDED_FOR when there is more than one
Fixes #10342

* Fetch the first IP from a list of IPs

* Return the first non empty IP