When replaying messages during channel-reestablishment,
previously we first resent all update messages, along with potential commitment_signed messages,
and then we potentially resent a single revoke_and_ack.
This can result in incorrect behaviour in case both a commitment_signed and a revoke_and_ack needs to be resent.
When replaying messages, the relative order of commitment_signed and revoke_and_messages needs to be preserved.
(the order of updates (htlc/fee) in relation to the revack messages does not matter)
implements https://github.com/lightning/bolts/pull/810
The logic here is somewhat based on what c-lightning does:
https://github.com/ElementsProject/lightning/blob/01e5f1886e31816e652f417a1ff789a26aaeec3b/channeld/channeld.c#L3059
SomberNight
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