gfe-relnote: Default-initialize QUIC BBRv2 loss event threshold for exiting STARTUP from a flag. Protected by --gfe2_reloadable_flag_quic_default_to_bbr_v2.

PiperOrigin-RevId: 264298542
Change-Id: I304ab19e4820dec51d3f8ef53762a393f6b175fd
diff --git a/quic/qbone/qbone_control.proto b/quic/qbone/qbone_control.proto
new file mode 100644
index 0000000..f0090d6
--- /dev/null
+++ b/quic/qbone/qbone_control.proto
@@ -0,0 +1,13 @@
+syntax = "proto2";
+
+option optimize_for = LITE_RUNTIME;
+
+package quic;
+
+message QboneServerRequest {
+  extensions 1000 to max;
+};
+
+message QboneClientRequest {
+  extensions 1000 to max;
+};