Merge branch 'tipc-multicast-through-replication'

Jon Maloy says:

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tipc: emulate multicast through replication

TIPC multicast messages are currently distributed via L2 broadcast
or IP multicast to all nodes in the cluster, irrespective of the
number of real destinations of the message.

In this series we introduce an option to transport messages via
replication ("replicast") across a selected number of unicast links,
instead of relying on the underlying media. This option is used when
true broadcast/multicast is not supported by the media, or when the
number of true destinations is much smaller than the cluster size.
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Signed-off-by: David S. Miller <davem@davemloft.net>