Origin for each line in rc from check-in 8bc8c738d5:

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: 
8bc8c738d5 2022-05-31        arcade: MAKEINIT="make -D AUTOBOOT -C /etc/mrc -k"
f8700c9031 2022-05-29        arcade: NCPU=$((`/sbin/sysctl -n hw.ncpu` + 1 ))
f8700c9031 2022-05-29        arcade: #MAKEDEBUG="-d -nelLx"
f8700c9031 2022-05-29        arcade: 
f8700c9031 2022-05-29        arcade: mount -t tmpfs tmpfs /etc/mrc/tmp && ${MAKEINIT} -j ${NCPU} ${MAKEDEBUG} -X TMPDIR=/etc/mrc/tmp && umount /etc/mrc/tmp || ${MAKEINIT}
17041521b1 2019-10-23        arcade: 
17041521b1 2019-10-23        arcade: echo ''
17041521b1 2019-10-23        arcade: date
17041521b1 2019-10-23        arcade: exit 0