Option to disable content-length check on request

[rightaway]

If I send a request with a content-length header that doesn't match the exact length of the request's content, it doesn't work. If it's too short, the content gets truncated to that length. If it's too long, then the request just hangs as the server expects the remaining bytes to come in.

Could we have an option to disable this so we can switch it off in development? If I'm changing the request body of an existing request in chrome dev tools, I need to always remember to delete the content-length header before sending the request, otherwise things break.

Like koa doesn't enforce a request body length when there's no content-length header, it would also be useful in development to have an option to disable the check even when the content-length header is provided.