don't send VN in response to VN
don't send VN in response to VN

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