Change representation of consumers to a) add the ctag to the key so we can cope when the same channel consumes the same queue more than once and b) do not table scan when looking up consumers for a channel.
Delete all consumers when a queue goes down.
Further adventures in vertical alignment.
Further further adventures in vertical alignment.
Also delete all consumers when a channel goes down.
Merge bug 25606 into bug 25600.
merge bug25600 into stable