[4.1] b21bd69 Sync changelog

[Federico G. Schwindt]

commit b21bd69c467b53399787398579bc2a740d8235d9
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Sun Apr 3 12:25:39 2016 +0100

    Sync changelog

diff --git a/doc/changes.rst b/doc/changes.rst
index 4258e26..1a2bf7b 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -10,10 +10,12 @@ Bugs fixed
 * 1879_ - Correct handling of duplicate headers on IMS header merge
 * 1878_ - Fix a ESI+gzip corner case which had escaped notice until now
 * 1871_ - Missing error handling code in V1F_Setup_Fetch
+* 1725_ - Revive the backend_conn counter
 
 .. _1879: https://github.com/varnishcache/varnish-cache/issues/1879
 .. _1878: https://github.com/varnishcache/varnish-cache/issues/1878
 .. _1871: https://github.com/varnishcache/varnish-cache/issues/1871
+.. _1725: https://github.com/varnishcache/varnish-cache/issues/1725
 
 ================================
 Varnish Cache 4.1.2 (2016-03-04)