[glib/mcatanzaro/#2393] gdtlsconnection: document get_binding_data vfunc

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 277e27a6c6f0da76df86309fabdc505f5b378ae3
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Fri Apr 30 10:44:16 2021 -0500

    gdtlsconnection: document get_binding_data vfunc

 gio/gdtlsconnection.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gio/gdtlsconnection.h b/gio/gdtlsconnection.h
index e73cf1459..351586801 100644
--- a/gio/gdtlsconnection.h
+++ b/gio/gdtlsconnection.h
@@ -46,7 +46,8 @@ typedef struct _GDtlsConnectionInterface GDtlsConnectionInterface;
  * @shutdown_async: Start an asynchronous shutdown operation.
  * @shutdown_finish: Finish an asynchronous shutdown operation.
  * @set_advertised_protocols: Set APLN protocol list
- * @get_negotiated_protocol: Retrieve ALPN-negotiated protocol
+ * @get_negotiated_protocol: Get ALPN-negotiated protocol
+ * @get_binding_data: Retrieve TLS channel binding data
  *
  * Virtual method table for a #GDtlsConnection implementation.
  *