dhcp6: fix to allow supported devices (bnc#874561)
Merge pull request #217 from mtomaschewski/bnc874561

dhcp6: fix to allow supported devices (bnc#874561)
dhcp,autoip: log unsupported devices in debug1 level
Merge pull request #218 from mtomaschewski/bnc874561

dhcp,autoip: log unsupported devices in debug1 level