fixed: Don't unquote(urldecode) file_original_path as it breaks hashing

I stumbled onto this while accidently checking the log while playing something from a webdav share. Unquoting/urldecoding paths will cause the filehash open function to basically open the wrong file as it's no longer url decoded causing failure. I don't know the idea behind the unquote(), it could be a remnant but it really seems wrong.