Log Message:
Update to 20110222.

Changes include
- man page claims that you can use auth type = none, but in reality this
didn't work (insisted on a username being given and then used, plus always
advertised CHAP to the target). Make initiator work as advertised (i.e.
defaults to auth type none and so don't require a username).
- document -D option to iscsi-initiator
- Remove hostname from pathname to storage in mount point.
This means /mnt/mytarget.domain.local/target0/storage is now
/mnt/target0/storage.
- Note limitations of CHAP implementation in BUGS section.
- Skip target if TargetName is empty.
- Use relevant TargetAddress, not just first one we happen to find.
- Handle NOP-OUT CmdSN and immediate bit.
- Handle NOP-IN TransferTag=0xffffffff.
- Interim solution for dealing with Underflow bit in iSCSI response.
- iscsi-initiator now talks to istgt and other targets.
- Retry read capacity. Device may not be ready on first access, so need to
wait and re-issue.