Update dependencies

debian/control

@@ -14,8 +14,8 @@ Build-Depends:
 Package: univention-icinga
 Architecture: all
 Depends: ${misc:Depends},
-    icinga (>= 1.11.3-1~),
-    icinga-doc (>= 1.11.3-1~),
+    icinga (>= 1.11.6-1~),
+    icinga-doc (>= 1.11.6-1~),
     nagios-plugins,
     nagios-images,
     nagios-nrpe-plugin,
@@ -23,7 +23,7 @@ Depends: ${misc:Depends},
     univention-config-registry,
     univention-base-files,
     shell-univention-lib
-Recommends: univention-nagios-server
+Recommends: univention-nagios-server, univention-nagios-client
 Description: host and network monitoring system
  Icinga is a modular monitoring framework for hosts, services, and
  networks, based on the Nagios project. It is designed to be easy to