Hammer bootloader

[Simon 'corecode' Schubert]

Hey,

seems I have finished hammer bootloader support (currently only boot2,
loader should be easy).  However the problem is that boot2 now exceeds
its size by 580 bytes.  This is a retarded limit, but what can you do.
While probing around I realized that hammer fs can't be installed at
offset 0 in disklabel, could that be?  Where is that documented and who
keeps me from doing that?
Anyways, this boot stuff is big time frustrating because there are so
many constants intertwingled.  I have no idea why my code currently
doesn't boot -- it doesn't even reach boot2's main().
cheers
   simon