This change would allow users to disable the `Content-Disposition`
header that is set for blob storage operations. The application will
continue to set a default value for `Content-Disposition` of
`attachment; filename={{.Filename}}` if no value was provided by the
user. However, with this change, users can now specifically disable this
header by setting the value to "-" in the configuration.
We feel this would be a nice solution for this issue:
https://github.com/Homebrew/brew/issues/15604
3c0c7148fd