95iscsi: generate commandline for software iscsi

95iscsi: generate commandline for software iscsi

When installing on an software iscsi root we need to generate
the correct commandline, otherwise the system cannot boot.

References: bnc#880108
Patch: 0093

When using software iscsi we should be using the existing
configuration from the system for the time being.

References: bnc#884768
Patch: 0095

Avoid bad ip route call on empty address
Patch: 0143

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>