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A network node is responsible for both broadcasting table events for entries it owns and for rebroadcasting table events from other nodes it has received. Table events to be broadcast are added to a single queue per network, including events for rebroadcasting. As the memberlist TransmitLimitedQueue is (to a first approximation) LIFO, a flood of events from other nodes could delay the broadcasting of locally-generated events indefinitely. Prioritize broadcasting local events by splitting up the queues and only pulling from the rebroadcast queue if there is free space in the gossip packet after draining the local-broadcast queue. Signed-off-by: Cory Snider <csnider@mirantis.com>