From: Roman Zippel <zippel@linux-m68k.org>

This is a complete rewrite of the HFS driver, it gets rid of a all the
special conversion options, which belong in user space.  The driver uses now
a btree support very similiar to HFS+, so that both could be merged at some
point.

Thanks to Ethan Benson <erbenson@alaska.net> for a number of patches to make
the driver more compliant with the spec and Christoph Hellwig <hch@lst.de>
for fixing up the documentation.