def key_for(package, *stuff)
      File.join(
        Config.s3_publish_pattern % package.metadata,
        *stuff
      )
    end
def key_for(package, *stuff)
      File.join(
        Config.s3_publish_pattern % package.metadata,
        *stuff
      )
    end
The unique upload key for this package. The additional "stuff" is
 postfixed to the end of the path.

 @example
   'el/6/x86_64/chef-11.6.0-1.el6.x86_64.rpm/chef-11.6.0-1.el6.x86_64.rpm'

 @param [Package] package
   the package this key is for
 @param [Array<String>] stuff
   the additional things to append

 @return [String]