install everything in /usr
    
    This patch is needed for the /usr-move feature
    https://fedoraproject.org/wiki/Features/UsrMove
    
    This package requires now 'filesystem' >= 3, which is only installable
    on a system which has /bin, /sbin, /lib, /lib64 as symlinks to /usr and
    not regular directories. The 'filesystem' package acts as a guard, to
    prevent *this* package to be installed on old unconverted systems.
    
    New installations will have the 'filesystem' >=3 layout right away, old
    installations need to be converted with anaconda or dracut first; only
    after that, the 'filesystem' package, and also *this* package can be
    installed.
    
    Packages *should* not install files in /bin, /sbin, /lib, /lib64, but
    only in the corresponding directories in /usr. Packages *must* not
    install conflicting files with the same names in the corresponding
    directories in / and /usr. Especially compatibility symlinks must not be
    installed.
    
    Feel free to modify any of the changes to the spec file, but keep the
    above in mind.