disorderfs - FUSE filesystem that introduces non-determinism

disorderfs is an overlay FUSE filesystem that introduces non-determinism
into filesystem metadata.  For example, it can randomize the order
in which directory entries are read.  This is useful for detecting
non-determinism in the build process.

See the man page for details.

After releasing, please also release a signed tarball:

    $ VERSION=FIXME
    $ git archive --format=tar --prefix=disorderfs-${VERSION}/ ${VERSION} | bzip2 -9 > disorderfs-${VERSION}.tar.bz2
    $ gpg --detach-sig --armor --output=disorderfs-${VERSION}.tar.bz2.asc < disorderfs-${VERSION}.tar.bz2

And commit them to our LFS repository at https://salsa.debian.org/reproducible-builds/reproducible-lfs
