ngx_http_upstream_empty_set_session   22 src/http/ngx_http_upstream_round_robin.c static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc,
ngx_http_upstream_empty_set_session  410 src/http/ngx_http_upstream_round_robin.c     r->upstream->peer.set_session = ngx_http_upstream_empty_set_session;