[4.0] 9827989 Add 1815 and 1768 to the changelog

[Martin Blix Grydeland]

commit 9827989f6fef28045eaa7076cfcb11f03f53e0c5
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Tue Apr 5 13:43:13 2016 +0200

    Add 1815 and 1768 to the changelog

diff --git a/doc/changes.rst b/doc/changes.rst
index 9a84b74..8d8932c 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -12,6 +12,8 @@ Changes from 4.0.3 to (unreleased)
 Bugs fixed
 ----------
 
+.. _1768: https://www.varnish-cache.org/trac/ticket/1768
+.. _1815: https://www.varnish-cache.org/trac/ticket/1815
 .. _1862: https://www.varnish-cache.org/trac/ticket/1862
 .. _1744: https://www.varnish-cache.org/trac/ticket/1744
 .. _1742: https://www.varnish-cache.org/trac/ticket/1742
@@ -20,6 +22,8 @@ Bugs fixed
 .. _1602: https://www.varnish-cache.org/trac/ticket/1602
 .. _1598: https://www.varnish-cache.org/trac/ticket/1598
 
+- 1768_ - Properly encode HTTP headers with weird characters to C identifiers.
+- 1815_ - Close piped sessions in the absence of backends
 - 1862_ - Request URL with whitespace is allowed
 - 1744_ - Update the users guide to for new -sfile syntax
 - 1742_ - Document varnishlog -w/-r with more details