set_session        50 event/ngx_event_connect.h     ngx_event_set_peer_session_pt    set_session;
set_session      1215 http/ngx_http_upstream.c         if (u->peer.set_session(&u->peer, u->peer.data) != NGX_OK) {
set_session       240 http/ngx_http_upstream_round_robin.c     r->upstream->peer.set_session =
set_session       346 http/ngx_http_upstream_round_robin.c     r->upstream->peer.set_session =