E.g. [RequestSizeLimit(Bytes=12345)] (nullable long)

This would use a Feature implemented by the servers to adjust the request size limit per request. See aspnet/KestrelHttpServer#1877.

This filter needs to be high priority so it runs before model binding or anything else that might read from the request body.

Scenario: The app has a low default limit that's acceptable for most endpoints (e.g. 1mb), but for some upload or streaming endpoints it needs a much higher or infinite limit.

Open question: What to do if the Feature can't be resolved? Throw NotSupportedException? Kestrel and HttpSysServer should support this by 2.0.