[PVE-User] pve wiki docs wrong -- shared zfs via iscsi isn't possible

[Dominik Csapak]

i think there is a misunderstanding here what zfs over iscsi actually does

zfs over iscsi does not mean we put zfs on an iscsi exported volume,
but rather the target exposed iscsi volumes that are created there via zfs

we then control (via ssh) the creation/deletion/renaming of said zvols
and use the set iscsi software (e.g. lio) to export them as iscsi luns

that way pve can use those iscsi luns as volumes for vms, make snapshots
(via ssh on zfs on the target) etc.

with this in mind i think it's obvious why the storage is marked
shared

regards
Dominik