Add backend support for L2 entries in web

httpd/httpd.c

@@ -573,6 +573,9 @@ void httpd_appcall(void)
 				send_counters(q[20]-'0');
 			} else if (is_word(q, "/eee.json")) {
 				send_eee();
+			} else if (is_word(q, "/l2.json")) {
+				parse_short(q + 13); // e.g.: /l2.json?idx=10
+				send_l2(short_parsed);
 			} else if (is_word(q, "/mirror.json")) {
 				send_mirror();
 			} else if (is_word(q, "/mtu.json")) {