EFI code did not pull out correct partition to use.
Tracking down bug with 3TB 4096 HDD, more tests
more debug
more debug
Dump the block we read
more debug
block number logic
minor fixes
Correctly use the device's block size for once.
Remove debug print, close issue. We were not using the device's reported
blocksize when computing the block to read.
Also update same math in zvol, for changing volsize.
Merge branch 'label_issue' into upstream-0.6.1