- 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).

- Build with -std=gnu89 to deal with GCC 5 defaulting to -std=gnu11
and that changing the semantics of 'inline'