An autoyast like this is not able to download installer updates

<profile xmlns="http://www.suse.com/1.0/yast2ns"
xmlns:config="http://www.suse.com/1.0/configns">
  <general>
    <self_update_url>
      <![CDATA[relurl://../installer-selfupdate/]]>     
    </self_update_url>
  </general> 
</profile>

It looks like relurl:// is not working for this case:

[Ruby] clients/inst_update_installer.rb(update_repositories):187 self-update
repositories are [#<Installation::UpdateRepository>
@uri="relurl://../installer-selfupdate/" @origin=:user]
[Ruby] clients/inst_update_installer.rb(add_repository):225 Adding update from
#<Installation::UpdateRepository> @uri="relurl://../installer-selfupdate/"
@origin=:user
[Pkg] PkgFunctions.cc(ExpandedUrl):570 URL 'relurl://../installer-selfupdate/'
is not valid: Componente de host inv���lido '..'
[Ruby] installation/update_repository.rb(repo_status):353 Probed repository
relurl://../installer-selfupdate/: 
[Ruby] installation/update_repository.rb(repo_status):359 Status of repository
at relurl://../installer-selfupdate/ cannot be determined
[Ruby] installation/updates_manager.rb(rescue in add_repository):102 Update
repository at relurl://../installer-selfupdate/ could not be read
relurl://../installer-selfupdate/

It would be nice to have a relative URL here