[master] acce95fe1 Mention witness.sh in the changelog

[Dridi Boukelmoune]

commit acce95fe1bb06fdd0ecaa3a586de0187e230f3a9
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Mar 10 16:15:19 2020 +0100

    Mention witness.sh in the changelog
    
    It can definitely be used in third party VMOD projects.

diff --git a/doc/changes.rst b/doc/changes.rst
index 8260a65bc..df6a3dbf7 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -64,7 +64,9 @@ NEXT (2020-03-15)
    happens with gzip objects inserted bypassing the built-in vfps
 
 * The option ``varnishtest -W`` is gone, the same can be achieved with
-  ``varnishtest -p debug=+witness``.
+  ``varnishtest -p debug=+witness``. A ``witness.sh`` script is available
+  in the source tree to generate a graphviz dot file and detect potential
+  lock cycles from the test logs.
 
 * The ``Process`` timestamp for ``vcl_synth {}`` was wrongly issued
   before the VCL subroutine, now it gets emitted after VCL returns for