Is disk cache in Coil 2.0 still needs specific header response?

[wiryadev]

I store my data to local database so the app still can load cached data when offile. But the image seems to be failed to load. I wonder if it is because the header has Cache-Control set to max-age=0, because if im not mistaken Coil 2.x use new disk caching mechanism.
If i have to set custom header, is it still the recommended way of doing it in 2.x?

[FishHawk]

According to coil's 2.0.0 change log:

- `Cache-Control` and other cache headers are still supported - except `Vary` headers, as the cache only checks that the URLs match.

Yes, coil still recognize the Cache-Control field. I think it would be better to use addHeader to avoid dropping other http header fields.