💡Allow PROXY Protocol

**Describe the feature you'd like**
I'd like to be able to access services with the PROXY protocol (https://www.haproxy.com/documentation/haproxy-configuration-tutorials/client-ip-preservation/enable-proxy-protocol/) using the IP that would be sent in CF-Connecting-IP field on HTTP(S) connections as true IP in order to avoid losing the IP of the client.

**Describe alternatives you've considered**
Cloudflare Spectrum allows this, but it's beyond my wallet.

**Additional context**
There's clear intent in showing the true IP address when we're talking about HTTP(S), might as well make it available for TCP with this feature.