[master] 0c1c2a7 Mention the change to ReqStart in "Upgrading to 6.0".

[Geoff Simmons]

commit 0c1c2a756c64e9305635df4e48b2e06e868a419f
Author: Geoff Simmons <geoff at uplex.de>
Date:   Mon Feb 26 16:25:15 2018 +0100

    Mention the change to ReqStart in "Upgrading to 6.0".

diff --git a/doc/sphinx/whats-new/upgrading-6.0.rst b/doc/sphinx/whats-new/upgrading-6.0.rst
index 0ccac58..4f5d75a 100644
--- a/doc/sphinx/whats-new/upgrading-6.0.rst
+++ b/doc/sphinx/whats-new/upgrading-6.0.rst
@@ -68,9 +68,11 @@ Other changes
 
   * XXX ...
 
-* XXX: etc. ...
+* ``varnishlog(1)``:
 
-  * XXX ...
+  * Added a third field to the ``ReqStart`` log record that contains the
+    name of the listener address over which the request was received, see
+    :ref:`vsl(7)`.
 
   * XXX ...