When using multiple layers of proxies one needs the ability not to re-set x-forwarded-[for|port|proto] on every layer; as the first proxy sets these headers on further layers the headers should not be clobbered so the final destination sees the correct address.
Allow forwarding for x-forwarded-[for|port|proto] to enabled layering…
… of http-proxies.
Updating to enableXForwarded
This should be true by default:
options.enableXForwarded = options.enableXForwarded === true;
defaults to true in e3d95ec