do not send too much after partial sendfile / splice
do not send too much after partial sendfile / splice

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