This makes the werror/rerror options available on the scsi-block device,
to allow user specify error handling policy similar to scsi-hd.
Signed-off-by: NFam Zheng <famz@redhat.com>
Message-Id: <20170821141008.19383-5-famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>