[master] d0d05af06 varnishd.7: Mention #3995

[Dridi Boukelmoune]

commit d0d05af067902da51ab02a1bbf03c13f0fde821a
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed Oct 11 09:42:10 2023 +0200

    varnishd.7: Mention #3995

diff --git a/doc/sphinx/reference/varnishd.rst b/doc/sphinx/reference/varnishd.rst
index 126ef802b..16aa63260 100644
--- a/doc/sphinx/reference/varnishd.rst
+++ b/doc/sphinx/reference/varnishd.rst
@@ -525,7 +525,8 @@ startup::
   vcl.use main
 
 Every line in the file, including the last line, must be terminated by
-a newline or carriage return.
+a newline or carriage return or is otherwise considered truncated, which
+is a fatal error.
 
 If a command in the file is prefixed with '-', failure will not abort
 the startup.