Documentation: Fix StateFilterOK for recovery notifications.

Refs #5762

doc/3.04-notifications.md

@@ -25,7 +25,8 @@ The user `icingaadmin` in the example below will get notified only on `WARNING`
     object User "icingaadmin" {
       display_name = "Icinga 2 Admin",
       enable_notifications = 1,
-      notification_state_filter = (StateFilterWarning |
+      notification_state_filter = (StateFilterOK |
+                                   StateFilterWarning |
                                    StateFilterCritical),
       notification_type_filter = (NotificationFilterProblem |
                                    NotificationFilterRecovery),  
@@ -40,6 +41,7 @@ The user `icingaadmin` in the example below will get notified only on `WARNING`
 > If you don't set the `notification_state_filter` and `notification_type_filter`
 > configuration attributes for the `User` object, all states and types will be
 > notified.
+> Recovery notifications require the state filter `StateFilterOK`.
 
 You should choose which information you (and your notified users) are interested in
 case of emergency, and also which information does not provide any value to you and

doc/4.3-object-types.md

@@ -252,7 +252,8 @@ Example:
       enable_notifications = 1,
       notification_period = "24x7",
 
-      notification_state_filter = (StateFilterWarning |
+      notification_state_filter = (StateFilterOK |
+                                   StateFilterWarning |
                                    StateFilterCritical |
                                    StateFilterUnknown),
       notification_type_filter = (NotificationFilterProblem |
@@ -274,7 +275,7 @@ Available notification type and state filters:
     StateFilterWarning
     StateFilterCritical
     StateFilterUnknown
-    
+
     NotificationFilterDowntimeStart
     NotificationFilterDowntimeEnd
     NotificationFilterDowntimeRemoved
@@ -284,10 +285,11 @@ Available notification type and state filters:
     NotificationFilterRecovery
     NotificationFilterFlappingStart
     NotificationFilterFlappingEnd
-    
+
 > **Note**
 >
 > In order to notify on problem states, you will need the type filter `NotificationFilterProblem`.
+> Recovery notifications require the state filter `StateFilterOK`.
 
 Attributes: