Origin for each line in rc from check-in 17041521b1:

17041521b1 2019-10-23        arcade: #!/sbin/sh -Tue -
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: stty status '^T'
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: trap : 2
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: HOME=/
17041521b1 2019-10-23        arcade: PATH=/sbin:/bin:/usr/sbin:/usr/bin
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: export PATH HOME
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: make -D AUTOBOOT -C /etc/mrc
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: echo ''
17041521b1 2019-10-23        arcade: date
17041521b1 2019-10-23        arcade: exit 0