swarm/storage/mru: Renamed all comments to Feeds

swarm/storage/mru/cacheentry.go

swarm/storage/mru/doc.go

swarm/storage/mru/error.go

swarm/storage/mru/handler.go

swarm/storage/mru/handler_test.go

swarm/storage/mru/id.go

swarm/storage/mru/lookup/lookup.go

swarm/storage/mru/query.go

swarm/storage/mru/request.go

swarm/storage/mru/request_test.go

swarm/storage/mru/sign.go

swarm/storage/mru/topic.go

swarm/storage/mru/update.go

swarm/storage/mru/view.go