Lines of bootfs.init from check-in 8f80b79392 that are changed by the sequence of edits moving toward check-in 67838bd249:

                         1: # vim:ft=make:
                         2: 
                         3: bootfs: fsck
                         4: 	: Checking whether we need /boot mounted.
8f80b79392 2019-10-20    5: 	mount -vadr | grep -q ' /boot$$' && mount -r /boot || exit 0