version-0.6.18

• initial pre/post-up/down script and systemd service start support
  (bsc#920070,boo#907215)
• fixed lease address owner and lifetime tracking to update address
  lifetimes on dhcp6 renewal, correctly drop (requesting/deferred)
  leases in wickedd not (yet) existing as lease in dhcp supplicants
  and avoid address exists error messages (bsc#920889,bsc#907694)
• add missed wpa_supplicant's wireless mode names (bsc#927616)
• schema: require macvlan lower device same as vlan (bsc#927065)
• fixes to use only ready devices by name to avoid dependency
  confusion mapping config to wrong device, event races and wrong
  use of the link-up instead of the wireless link-associated event
  (bsc#918662,bsc#921218).