Tip about lost+found

[Andrew Hume]

independent of steve's program (which looks quite formal yet useful),
don't blame mkfs for not making a lost+found. it seems fairly clear
that the responsibility for l+f is solely with the only program
that uses it, fsck (and its cousins). there is no technical reason
for fsck not creating a lost+found dir unless the file system is completely
out of space.