[5.2] f07449b Intro sentences to "Changes to VCL" for 5.2.

[PÃ¥l Hermunn Johansen]

commit f07449bc0c67997329641a79de282c4c94469215
Author: Geoff Simmons <geoff at uplex.de>
Date:   Thu Sep 14 11:44:24 2017 +0200

    Intro sentences to "Changes to VCL" for 5.2.

diff --git a/doc/sphinx/whats-new/upgrading-5.2.rst b/doc/sphinx/whats-new/upgrading-5.2.rst
index 477efe4..8c335e6 100644
--- a/doc/sphinx/whats-new/upgrading-5.2.rst
+++ b/doc/sphinx/whats-new/upgrading-5.2.rst
@@ -29,13 +29,8 @@ the notes about changes for developers below.
 Changes to VCL
 ==============
 
-*XXX: intro paragraph*
-
-*XXX: emphasize what most likely needs to be done, if anything,*
-*to migrate from 5.1 to 5.2*
-
-*XXX: ... or reassure that you probably don't have to do anything*
-*to migrate from 5.1 to 5.2*
+We have added a few new variables and clarified some matters. VCL
+written for Varnish 5.1 should run without changes on 5.2.
 
 Consistent symbol names
 ~~~~~~~~~~~~~~~~~~~~~~~