[master] 7941e75e5 changes: Mention SLT_Link[4]

[Dridi Boukelmoune]

commit 7941e75e59bf3d09c7dd6037815b94035d35cfdb
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed Sep 7 17:19:26 2022 +0200

    changes: Mention SLT_Link[4]

diff --git a/doc/sphinx/whats-new/changes-trunk.rst b/doc/sphinx/whats-new/changes-trunk.rst
index f6745bb4e..9772d1e34 100644
--- a/doc/sphinx/whats-new/changes-trunk.rst
+++ b/doc/sphinx/whats-new/changes-trunk.rst
@@ -103,6 +103,8 @@ thereof) in log utilities to include sub-tasks or not. Internally, only ESI
 tasks are subject to this filtering, but it can apply to tasks spawned by
 VMODs too.
 
+Similarly, the ``Link`` record has the same optional 4th field.
+
 .. XXX: any reason against ``varnish{hist,top} -k``?
 
 The ``-k`` option from ``varnishlog`` is now available in ``varnishncsa``.