Default portal being IPv4 only

[martinhoyer]

With auto_add_default_portal on, every tpg created will try to add 0.0.0.0:3260 portal.
This is great, but is there any downside to use ::0 by default instead as it listens on both IPv4 and IPv6?

In my example, iSCSI initiator is using target's hostname with IPv6-enabled DNS. In order to make it work, one has to delete the default portal and create ::0 3260 instead.