Lighttpd

As only the callback pointers are saved in the server config it is not trivial to find the backend name.

While this is more feasible to do in modern lighttpd, the value is questionable. lighttpd uses "sendfile" on FILE_CHUNKs and "writev" on MEM_CHUNKs. If "sendfile" fails on FILE_CHUNKs (or is not available), then modern lighttpd falls back to read the file into memory and use "writev". In older lighttpd versions, without the fallback, knowing the server.network-backend setting would have been more useful.

--- a/src/mod_status.c
+++ b/src/mod_status.c
@@ -772,6 +772,12 @@ static handler_t mod_status_handle_server_config(request_st * const r) {
                                  srv->srvconf.event_handler,
                                  strlen(srv->srvconf.event_handler));

+       const char *network_backend = srv->srvconf.network_backend
+         ? srv->srvconf.network_backend->ptr
+         : "sendfile";
+       mod_status_row_append(b, CONST_STR_LEN("Network Backend"),
+                                 network_backend, strlen(network_backend));
+
        mod_status_header_append(b, CONST_STR_LEN("Config-File-Settings"));

        mod_status_row_append(b, CONST_STR_LEN("Loaded Modules"), BUF_PTR_LEN(tb));