SetID is missing in both GetSets and GetRules

[sbezverk]

It looks like even though netlink message sent to kernel carries SetID when Set is created or a rule with Lookup expression is created. But when GetRules or GetSets returns information, SetID is always 0. It looks like the return message is missing unix.NFTA_SET_ID attribute. I have done all debugging I could in user land, now need some help from kernel land.
It is a big problem if anonymous sets are used in the same table.

[sbezverk]

As it was discovered from nftables source:

* @NFTA_SET_ID: uniquely identifies a set in a transaction (NLA_U32)

SET_ID is set only during the transaction, so it is not available at any other time. This seriously cripples use of Anonymous sets where a name of set is hard coded. With this, no more than one Anonymous set is possible per table.
Closing this issue.