[2930] Adjust terminology in docs

So it is the same as in the ipc-high.txt.

src/lib/config/ccsession.h

@@ -425,9 +425,9 @@ public:
                                            params =
                                            isc::data::ConstElementPtr());
 
-    /// \brief Send a notification to subscribed clients
+    /// \brief Send a notification to subscribed users
     ///
-    /// Send a notification message to all clients subscribed to the given
+    /// Send a notification message to all users subscribed to the given
     /// notification group.
     ///
     /// This method does not not block.
@@ -437,7 +437,7 @@ public:
     ///
     /// \throw CCSessionError for low-level communication errors.
     /// \param notification_group This parameter (indirectly) signifies what
-    ///     clients should receive the notification. Only the clients that
+    ///     users should receive the notification. Only the users that
     ///     subscribed to notifications on the same group receive it.
     /// \param name The name of the event to notify about (for example
     ///     `config_changed`).

src/lib/python/isc/config/ccsession.py

@@ -541,9 +541,9 @@ class ModuleCCSession(ConfigData):
 
     def notify(self, notification_group, event_name, params=None):
         """
-        Send a notification to subscribed clients.
+        Send a notification to subscribed users.
 
-        Send a notification message to all clients subscribed to the given
+        Send a notification message to all users subscribed to the given
         notification group.
 
         See docs/design/ipc-high.txt for details about notifications
@@ -553,7 +553,7 @@ class ModuleCCSession(ConfigData):
         - CCSessionError: for low-level communication errors.
         Params:
         - notification_group (string): This parameter (indirectly) signifies
-          what clients should receive the notification. Only clients that
+          what users should receive the notification. Only users that
           subscribed to notifications on the same group receive it.
         - event_name (string): The name of the event to notify about (for
           example `config_changed`).