Release v4.0.2
This release changes basic bundle validation to support previously
non-passing bundles in upstream so mixes with previous versions are not
so strictly filtered. Hardlinking only happens if --keep-chroots is
passed to avoid race conditions and wasting time hardlinking when it
does not need to happen. Issues with bundle list were fixed, offline
mode was added for mixer to skip caching upstream bundle definitions, a
default value for local-bundle directory was added, and other updates to
variables to match the new naming schemes 4.0.* introduced.
