do not re-enqueue if the request is already queued for streamed processing
do not re-enqueue if the request is already queued for streamed processing

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