Intended use is with system presets to enable the following:
iscsi.service - login of automatic node records
iscsid.socket - start iscsid as needed for all iSCSI sessions
iscsiuio.socket - start iscsiuio as needed for bnx2i or qedi
iscsi-onboot.service - special handling of initramfs sessions
The following are started automatically as needed:
iscsid.service - needed for all iSCSI sessions
iscsiuio.service - needed for bnx2i or qedi offload
iscsi-init.service - create an iSCSI name if missing before starting iscsid
iscsi-shutdown.service - ensure all non-boot sessions logout at shutdown
