Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Print the source of the geometry determination.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Fix the MBR geometry extraction; there was an off-by-2 error in the
MBR signature offset.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Update copyright notices.  Per agreement with my new employer, Intel
Corporation, add Intel copyright notices where appropriate.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Impact: aestetics

Change "and contributors" to "et al" so that the message actually fits
on one line.  This is unfortunate, but what can you do...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Clarify that there are nowadays more copyright holders than just
myself.

Move the floppy disk geometry generation code into parallel with the
MBR code, which pretty much mimics the previous behavior.

We can't rely on the disk type to say if this is FAT vs MBR, since we
haven't determined that yet.  Thus, move the FAT test up before the
MBR test; both are heuristic, but the FAT test has much less
probability of false positives, and can be further tightened if
needed.

If a "large floppy" image is formatted with a FAT filesystem, we can
use the headers in the FAT image to derive the geometry.  This is nice
and user-friendly, so do it that way.