Bug report from luckboy: rm -f on a broken symlink didn't work because our "does it exist" test (to avoid errors on rm -f of nonexistent files) said it didn't. The fix: replace the access() with unlink(), which produces the same "does not exist" errno and has the added bonus of acting as a fastpath for rm -f on non-directories. (And since it produces a different error on directories, falls through to the old behavior there.) Most of this commit is comment updates explaining being subtle. :)

syntax: glob
.config*
generated/
kconfig/mconf
kconfig/conf
toybox
toybox_unstripped