We would do well to integrate HFS/HFS+ support well enough to do several
things:

1. boot a kernel from it.

2. run on an FFS on a vnd inside an HFS/HFS+ file.

3. mount & manipulate HFS/HFS+ files like a more or less normal FS.

#2 would give us the ability to let people download an "hqx" file that
unpacks into a kernel and an FFS-in-single-file into a MacOS HFS/HFS+
system to "try before you buy" (i.e. run NetBSD on that FFS on vnd in an
otherwise pristine HFS/HFS+).

	Erik