Origin for each line in hostname.init.mk from check-in 7a1e7f4a58:

7a1e7f4a58 2019-10-21        arcade: HOSTNAME?=Amnesiac
7a1e7f4a58 2019-10-21        arcade: 
7a1e7f4a58 2019-10-21        arcade: hostname:
7a1e7f4a58 2019-10-21        arcade: 	echo "MRC:$@> Setting to ${HOSTNAME}."
7a1e7f4a58 2019-10-21        arcade: 	hostname ${HOSTNAME}