NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING  425 src/http/ngx_http_upstream.c     { ngx_string("X-Accel-Buffering"), NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING },
NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING 4401 src/http/ngx_http_upstream.c     if (u->conf->ignore_headers & NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING) {