Origin for each line in root.init from check-in 8f80b79392:

5062c9b6fc 2019-10-19    1: # vim:ft=make:
5062c9b6fc 2019-10-19    2: 
8f80b79392 2019-10-20    3: root: fsck bootfs
5062c9b6fc 2019-10-19    4: 	: Mount root R/W.
5062c9b6fc 2019-10-19    5: 	mount -uo rw /
8f80b79392 2019-10-20    6: 	umount -a