capture: hack to catch bonding arp type changes
schema: separate ethernet properties and configuration

Properties extend configuration, permanent-address is a property
bonding: do not fail when min_links does not exists
Link-address-type vs. interface-type(kind) cleanup
dhcp4: do not try to map iftype(kind) to arp-type
names: dropped iftype(kind) to arptype map helpers

There is no 1:1 relation: bond may have arp-type ether or infiniband.
Further, it's arp-type changes at enslave time of the first slave.
Merge pull request #114 from mtomaschewski/iftype-cleanup