memcached: 1.6.21 -> 1.6.22

pkgs/servers/memcached/default.nix

···
 {lib, stdenv, fetchurl, cyrus_sasl, libevent, nixosTests }:
 
 stdenv.mkDerivation rec {
-  version = "1.6.21";
+  version = "1.6.22";
   pname = "memcached";
 
   src = fetchurl {
     url = "https://memcached.org/files/${pname}-${version}.tar.gz";
-    sha256 = "sha256-x4iYDvxBfdXZPEQrHIuHafsgGIlsKd44h9IqLxQ9ou4=";
+    sha256 = "sha256-NHg6kKTM90xBBwhf2Stoh0nSOyds/a2fBOT3JaBdHKc=";
   };
 
   configureFlags = [