Joost Jager c325bf8c57 htlcswitch: sync link hand-off ...

This commit extends the link with a new synchronous delivery point for
local UpdateAddHTLC messages. The switch method SendHTLC is updated to
use this delivery point and thereby becomes a synchronous call.

For MPP payments, synchronous hand-off is important. Otherwise the next
pathfinding round could start without the channel balance updated yet.

2020-05-20 08:03:48 +02:00

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