feat: add missing SOCKS5 features
feat: add missing SOCKS5 features

Goal of this commit is to add some missing features when the
Kubernetes API is accessed through a SOCKS5 proxy. That's for
example the case when port-forwarding is used (`kubectl port-forward`)
or when exec'ing inside a container (`kubectl exec`), with this
commit it'll now be possible to use both.

Signed-off-by: Romain Aviolat <romain.aviolat@kudelskisecurity.com>
Signed-off-by: Romain Jufer <romain.jufer@kudelskisecurity.com>

Kubernetes-commit: 0a98875e9572d998fbdf3bcdaef4961715b8bc06

kubernetes/code-generator,kubernetes/code-generator