The attached patch adds an iSCSI transport class. It was
built against scsi-misc-2.6. It allows the software/virtual
iSCSI driver to remove at least one of its ioctl commands.
The patch also assumes the no multipath/failover rule in
llds applies to iSCSI drivers, so when we remove our
portal/portal_group failover support it will allow us to
kill all our ioctl commands execpt the session creation one
(that will take more thought).

We would like to build some functions like the
unblock/block capabilites into the iscsi transport class
like James Smart has done with FC class. but initially we
would like to begin with this smaller patch that only provides
an iscsi sysfs interface.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>