Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/4794
The `masters` and `slaves` file probably does not need a license header
(although the rules of when you need one and when not are not very clear to me).
I think config files frequently have a license header, so I would take the
`zoo.cfg` change.
@yew1eb Are you okay if we merge this without the changes to `masters` and
`slaves`?---
