Origin for each line in ifconfig.init.mk from check-in c9cd53b0f6:

7a1e7f4a58 2019-10-21        arcade: IFCONFIG_IFACES?=lo0
c9cd53b0f6 2019-10-23        arcade: IFCONFIG_lo0?="inet 127.0.0.1/8 up"
7a1e7f4a58 2019-10-21        arcade: 
7a1e7f4a58 2019-10-21        arcade: ifconfig: adjkerntz wlans cloned kld
7a1e7f4a58 2019-10-21        arcade: 	echo "MRC:$@> Starting interfaces: ${IFCONFIG_IFACES}"
7a1e7f4a58 2019-10-21        arcade: .for iface in ${IFCONFIG_IFACES}
c9cd53b0f6 2019-10-23        arcade: .for item in ${IFCONFIG_${iface}}
c9cd53b0f6 2019-10-23        arcade: 	ifconfig ${iface} ${item}
c9cd53b0f6 2019-10-23        arcade: .endfor
7a1e7f4a58 2019-10-21        arcade: .endfor