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4c6e19f2e1
Before this, we had 2 different ways to interact with ipsets, through the handler interface which had the best handling for IPv6 because NPC heavily utilizes it, and through the ipset struct which mostly repeated the handler logic, but didn't handle some key things. NPC utilized the handler functions and NSC / NRC mostly utilized the old ipset struct functions. This caused a lot of duplication between the two groups of functions and also caused issues with proper IPv6 handling. This commit consolidates the two sets of usage into just the handler interface. This greatly simplifies how the controllers interact with ipsets and it also reduces the logic complexity on the ipset side. This also fixes up some inconsistency with how we handled IPv6 ipset names. ipset likes them to be prefixed with inet6:, but we weren't always doing this in a way that made sense and was consistent across all functions in the ipset struct.