org.reactivestreams.Subscription add cancelOnError(Throwable) method

[qinarmy-zoro]

org.reactivestreams.Subscription interface should add void cancelOnError(Throwable) method,
1.downstream occur exception must cancel.
2.upstream should distinguish between nornal and error.
3. if cancel for error,upstream can do something,like block api try-catch.
please, I guess that is important.