Bug report

Presently, the Cilium documentation has information buried deep within it that call out specific kernel versions required for various cilium features. In order to assist users with finding this information earlier in their discovery process, it should be moved to the System Requirements page to be maintained as new features are added which are kernel dependent.

General Information
kube-proxy free and 4.19.57 requirement - https://cilium.readthedocs.io/en/stable/gettingstarted/kubeproxy-free/

host reachable services and 4.19.57 requirement - https://docs.cilium.io/en/v1.7/gettingstarted/host-services/

Sockmaps - 4.19.?? - not documented - only hit = https://docs.cilium.io/en/v1.7/architecture/#datapath
kTLS - 4.19.?? - not documented - only hit = https://docs.cilium.io/en/v1.7/envoy/extensions/#envoy-go-extensions

How to reproduce the issue

1. Search the docs for above terms