NGX_HTTP_UPSTREAM_FT_HTTP_503  210 src/http/modules/ngx_http_fastcgi_module.c     { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
NGX_HTTP_UPSTREAM_FT_HTTP_503  218 src/http/modules/ngx_http_proxy_module.c     { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
NGX_HTTP_UPSTREAM_FT_HTTP_503   81 src/http/modules/ngx_http_scgi_module.c     { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
NGX_HTTP_UPSTREAM_FT_HTTP_503  113 src/http/modules/ngx_http_uwsgi_module.c     { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
NGX_HTTP_UPSTREAM_FT_HTTP_503  405 src/http/ngx_http_upstream.c     { 503, NGX_HTTP_UPSTREAM_FT_HTTP_503 },
NGX_HTTP_UPSTREAM_FT_HTTP_503   37 src/http/ngx_http_upstream.h                                              |NGX_HTTP_UPSTREAM_FT_HTTP_503  \