Add a rejection for update when channel is pruned #1378
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In case a channel has been pruned, and we receive a recent update, we "unprune" it and immediately request the channel announcement again (which will cause us to revalidate it). We also discard the update, assuming that we will receive it again with the channel announcement. We were using a `GossipDecision.Duplicate` rejection for the channel update, which is inaccurate. This PR introduces a new `GossipDecision.RelatedChannelPruned`.
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In case a channel has been pruned, and we receive a recent update, we
"unprune" it and immediately request the channel announcement again
(which will cause us to revalidate it). We also discard the update,
assuming that we will receive it again with the channel announcement.
We were using a
GossipDecision.Duplicaterejection for the channelupdate, which is inaccurate. This PR introduces a new
GossipDecision.RelatedChannelPruned.