ref: 58a63a5cff382becb5ddc6bf256ee7571e1daf59
dir: /README/
forks, patches, bikeshedding. example usage: ; ramfs -u ; unionfs -m /sys -c /tmp /usr/qwx/p/fork/sys /tmp /sys ; cd /tmp ; mkdir -p `{cd /sys; walk -d src include} ; cd /sys/src ; mk nuke ; mk install unionfs: http://shithub.us/kvik/unionfs/HEAD/f.html