avoid null-deref of `peeraddr` depending on the environment
avoid null-deref of `peeraddr` depending on the environment

h2o/h2o,h2o/h2o,h2o/h2o,h2o/h2o,cwyang/h2o,cwyang/h2o,cwyang/h2o,h2o/h2o,yannick/h2o,devnexen/h2o,yannick/h2o,yannick/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,devnexen/h2o,cwyang/h2o,h2o/h2o,devnexen/h2o,h2o/h2o,devnexen/h2o,yannick/h2o,cwyang/h2o,devnexen/h2o,yannick/h2o,devnexen/h2o,yannick/h2o,h2o/h2o,yannick/h2o,h2o/h2o,yannick/h2o,cwyang/h2o,devnexen/h2o,yannick/h2o,cwyang/h2o