lightclient

Seems like `TestHTTPWriteTimeout` is also flaky: https://ci.appveyor.com/project/ethereum/go-ethereum/builds/50081925/job/eg9afjcao7qspxss

Adding a comment seems reasonable. Do you want to submit a PR @shoenseiwaso?

I think this is fixed now.

Closing this until it is accepted to `ethereum/execution-apis`.