- s390: make sure network device has been activated before
  driver update (bnc #616341, bnc #862673)
add 'autoyast2' option in preparation to fate #316530

The difference to 'autoyast' is that linuxrc itself downloads the file and
passes the autoyast.xml file to yast.
We have to use a different option name because autoyast uses it's own
url schemes different from linuxrc.
Merge pull request #5 from openSUSE/fate316530

Fate316530