aggregator_expire: make noise if we can't write to internal pipes (as it should never fail)
aggregator_expire: make noise if we can't write to internal pipes (as it should never fail)

grobian/carbon-c-relay,piotr1212/carbon-c-relay,grobian/carbon-c-relay,piotr1212/carbon-c-relay,grobian/carbon-c-relay,piotr1212/carbon-c-relay,piotr1212/carbon-c-relay