ifas without an ifa_addr seem to indicate a link without a hwaddr, so treat them as such. This allows static and 3rdparty configuration.
ifas without an ifa_addr seem to indicate a link without a hwaddr, so
treat them as such. This allows static and 3rdparty configuration.

rsmarples/dhcpcd,rsmarples/dhcpcd,rsmarples/dhcpcd