NGX_HTTP_MAX_URI_CHANGES 2535 src/http/ngx_http_core_module.c     sr->uri_changes = NGX_HTTP_MAX_URI_CHANGES + 1;
NGX_HTTP_MAX_URI_CHANGES  594 src/http/ngx_http_request.c     r->uri_changes = NGX_HTTP_MAX_URI_CHANGES + 1;