* seastar 7ebbb26...124467d (4):
> peering_sharded_service: prevent over-run the container
> sharded: fix move constructor for peering_sharded_service services
> sharded: improve support for cooperating sharded<> services
> sharded: support for peer services
Includes change to batchlog_manager constructor to adapt it to
seastar::sharded::start() change.
Needed for gossip backport.