Comment 1 for bug 1525770

I'm also wondering if we should be able to overwrite basic headers some cases.

For example, when we overwrite object content with Storlet, the value in ETag header becomes different from the one calculated based on the response content. (This causes error in "swift download" because in swift command it checkes ETag value)
If storlets can overwrite basic headers, then we can replace ETag value by new one, and old ETag value as another header, something like Original-ETag.