[master] e66abb742 Document quoted VSL fields

[Dridi Boukelmoune]

commit e66abb7428160bed712d13757cb4e9d59e87936a
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Fri Oct 25 09:31:16 2019 +0200

    Document quoted VSL fields
    
    Refs #2872

diff --git a/doc/changes.rst b/doc/changes.rst
index e55a4857c..44873d77c 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -38,6 +38,10 @@ NEXT (2020-03-15)
 
 * backend ``none`` was added for "no backend"
 
+* Log records can safely have empty fields or fields containing blanks if
+  they are delimited by "double quotes". This was applied to ``SessError``
+  and ``Backend_health``.
+
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 Varnish Cache 6.3.0 (2019-09-15)
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