make get_volume_status work without the DiskGroup model
oops! remove debug print
committing progress detaching disks to volumes
add methods to get disks used by a zpool
final step to remove DDP
deal with replacing disks in zpool parser + minor fixes
make zfs_replace_disk work without database entries, raw zpool operations
middleware method to get the disk from a label
clean authorized network for iscsi (by jpaetzel)
Hook in 'inherit owner' option.
