How will MEV-boost handle auth for CL<>EL communication? https://github.com/ethereum/execution-apis/blob/main/src/engine/authentication.md

Seems like most requests could just be forwarded, but engine_forkchoiceUpdatedV1 will need to be sent to the relay. So I think MEV-boost will need to accept a jwt-secret to let it decrypt engine_forkchoiceUpdatedV1 before sending it to the relay.