interfaces: T3871: report a name which changed hands between known cards

Cards rearranged among themselves, or a map edited by hand, leave every name
matched to a card the store knows - just not the one it had. That was filed
as an ordinary match, indistinguishable from a machine where nothing moved,
while the addresses configured under those names had quietly changed cable.

Report it separately. Which name goes to which card is unchanged, the slot
still decides; only the account of what happened is.

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