- it is gowork that is now used by Go-related bits in SlapOS, so using
  gowork is preferred as example. Besides we need gowork to be able to
  use any third-party Go package.

- other languages can use helloweb repository from under gowork/ tree as
  well.

The hash of helloweb.git is changed, becuase its layout had to be too
adjusted to match gowork mode:

nexedi/helloweb@a072af78...8bfedac6