NEWS update with link to 4.4.x

NEWS

@@ -7,6 +7,7 @@ notes for previous versions are posted below.
 
 For releases after 3.1, please visit:
 
+http://www.kamailio.org/wiki/features/new-in-4.4.x
 http://www.kamailio.org/wiki/features/new-in-4.3.x
 http://www.kamailio.org/wiki/features/new-in-4.2.x
 http://www.kamailio.org/wiki/features/new-in-4.1.x