I don't know half of what knc1 does on the subject, but that does look like a typo.
Bad knc1. No posting until you've had coffee. ;p
Code:
secure_cpu: 1, production: 1, unlocked: 0
is the state that we don't want to see.
So we'd want to keep the following:
Code:
exec getty -L $BAUD /dev/$UART 2>> $STDERR