avoid pass-by-value for h2o_url_t
avoid pass-by-value for h2o_url_t

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