[6.0] 86f9768f4 One more take on http_gzip_support=off

[Dridi Boukelmoune]

commit 86f9768f435462e167b183edde02d459bcda46d2
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed May 2 08:44:11 2018 +0200

    One more take on http_gzip_support=off

diff --git a/include/tbl/params.h b/include/tbl/params.h
index 829f48f12..8cfb7f0f3 100644
--- a/include/tbl/params.h
+++ b/include/tbl/params.h
@@ -598,7 +598,11 @@ PARAM(
 	"\n"
 	"Clients that do not support gzip will have their Accept-Encoding "
 	"header removed. For more information on how gzip is implemented "
-	"please see the chapter on gzip in the Varnish reference.",
+	"please see the chapter on gzip in the Varnish reference.\n"
+	"\n"
+	"When gzip support is disabled the variables beresp.do_gzip and "
+	"beresp.do_gunzip have no effect in VCL.",
+	/* XXX: what about the effect on beresp.filters? */
 	/* l-text */	"",
 	/* func */	NULL
 )