def privacy(id, privacy = false)
      drop = Drop.find(id)
      drop.update(:private => privacy)
    end
def privacy(id, privacy = false)
      drop = Drop.find(id)
      drop.update(:private => privacy)
    end
Modify a drop with a private URL to have a public URL or vice versa.

 Finds the drop by it's slug id, for example "2wr4".

 Requires authentication.

 @param [String] id drop id
 @param [Boolean] privacy privacy setting
 @return [CloudApp::Drop]