trying empty array

manifests/params.pp

@@ -194,6 +194,9 @@
 #   "Send Notification" to be unchecked.
 # @param  [boolean] ng_use_selinux_tools Whether to enable selinux tools and
 #   policies. only effective if selinux is enabled.
+# @param  [array] ng_required_hosts Array of FQDNs for hosts which should be
+#   allowed/required. every entry in the array creates a new line in the
+#   configuration file.
 ###############################################################################
 class cd_nagios::params (
 
@@ -302,7 +305,7 @@ $ng_ack_no_send       = '0',
 $ng_use_selinux_tools = true,
 
 # httpd
-
+$ng_required_hosts    = [''],
 
 ) {