[master] bc37ac28b Mention the fate of Python 2 in upgrade notes

[Dridi Boukelmoune]

commit bc37ac28b283a4a084a16d8a87abdbe6db62f547
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Mar 12 10:56:12 2019 +0100

    Mention the fate of Python 2 in upgrade notes
    
    At this point someone should take care of removing instructions for
    changes and upgrading documents authors to make sure they don't end
    up in the release.
    
    Instructions in doc/sphinx/installation/install.rst also need a
    serious refresh for all platforms and interested parties should take
    care of the platforms they are familiar with.

diff --git a/doc/sphinx/whats-new/upgrading-6.2.rst b/doc/sphinx/whats-new/upgrading-6.2.rst
index 758d18787..e4c4f7d21 100644
--- a/doc/sphinx/whats-new/upgrading-6.2.rst
+++ b/doc/sphinx/whats-new/upgrading-6.2.rst
@@ -164,6 +164,11 @@ The width of columns in ``backend.list`` and ``vcl.list`` output
 For developers and authors of VMODs and API clients
 ===================================================
 
+Python 3.4 or later is now required to build Varnish, or use scripts
+installed along with Varnish, such as ``vmodtool.py`` to build VMODs
+or other Varnish artifacts. Python 2 is no longer supported, and this
+support will likely be dropped from stable branches too.
+
 The VRT API has been bumped to version 9.0. Changes include:
 
 * Functions in the API have been added, and others removed.