use `st_http1_conn_t` rather than retaining separate members directly; also fixes potential bug `struct st_h2o_http1_finalostream_t *self = (struct st_h2o_http1_finalostream_t *)conn->req._ostr_top;` though this should not have caused an issue, as filters are registered when final response is passed
use `st_http1_conn_t` rather than retaining separate members directly; also fixes potential bug `struct st_h2o_http1_finalostream_t *self = (struct st_h2o_http1_finalostream_t *)conn->req._ostr_top;` though this should not have caused an issue, as filters are registered when final response is passed

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