to the very best of my knowledge, its input api payloads are always content-type:application/json; one can see this in effect via `kubectl --v=100 apply -f some

to the very best of my knowledge, its input api payloads are always content-type:application/json; one can see this in effect via `kubectl --v=100 apply -f some.yaml` and watch it serialize that yaml to json _then_ POST it