[Ready for Review] Track in-flight solving tx to delay HTLC failure update until enough confirmations#305

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ariard wants to merge 6 commits intolightningdevkit:masterfrom

ariard:2018-12-track-in-flight-preconfirmed-tx

Commits on Mar 29, 2019

Track HTLC-failure trigger tx until anti-reorg delay reached
Antoine Riard
committed
Implement block_disconnect for pruning of waiting-conf HTLC updates
Antoine Riard
committed
Delay failure of non-dust HTLC-outputs until solving timeout tx matures
Antoine Riard
committed
Fail back dust HTLC of local commitment tx after enough confirmations
Antoine Riard
committed
Implement delay channel closing in ChannelManager until maturation
Antoine Riard
committed
Add block_disconnecting tests to cancel HTLC failure updates
Antoine Riard
committed