[patch] HFS+ wrapper support

[Hollis Blanchard]

This patch (sent mostly for Marco) adds HFS wrapper support to the HFS+ 
code. All Apple-created HFS+ partitions are contained in an HFS wrapper 
for some backwards compatibility. The code is based on information 
found at http://developer.apple.com/technotes/tn/tn1150.html#HFSWrapper 
.

I only moved the minimum HFS code and structures into hfs.h. More could 
go there if desired.

When I tested this patch, an embedded filesystem was recognized as 
HFS+, but the HFS+ code itself did not discover any files, so there is 
probably still something wrong.

-Hollis

hfsplus-wrapper.txt
Description: Text document