PUBDEV-1484 Special-case net::ERR_CONNECTION_REFUSED
PUBDEV-1484 Special-case net::ERR_CONNECTION_REFUSED

nilbody/h2o-flow,h2oai/h2o-flow,junwucs/h2o-flow,junwucs/h2o-flow,junwucs/h2o-flow,h2oai/h2o-flow,nilbody/h2o-flow,printedheart/h2o-flow,nilbody/h2o-flow,printedheart/h2o-flow,printedheart/h2o-flow