[master] c22ccdcb2 Formally expose VSB_tofile in libvarnishapi

[Dridi Boukelmoune]

commit c22ccdcb2c605a78ecc07ffef694f3e0d5a34cc1
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed Mar 4 10:27:38 2020 +0100

    Formally expose VSB_tofile in libvarnishapi
    
    Closes #3238

diff --git a/lib/libvarnishapi/libvarnishapi.map b/lib/libvarnishapi/libvarnishapi.map
index 4c0acb133..0ba4c8500 100644
--- a/lib/libvarnishapi/libvarnishapi.map
+++ b/lib/libvarnishapi/libvarnishapi.map
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2011-2017 Varnish Software AS
+ * Copyright (c) 2011-2020 Varnish Software AS
  * All rights reserved.
  *
  * Author: Tollef Fog Heen <tfheen at varnish-software.com>
@@ -172,7 +172,16 @@ LIBVARNISHAPI_2.2 {
 
 LIBVARNISHAPI_2.3 {	/* 2019-09-15 release */
     global:
+	# vcs.c
 	VCS_String;
     local:
 	*;
 };
+
+LIBVARNISHAPI_2.4 {	/* 2020-03-15 release */
+    global:
+	# vsb.c
+	VSB_tofile;
+    local:
+	*;
+};