enh(doc): improve poller configuration

doc/en/administration_guide/poller/wizard_add_poller.rst

@@ -38,8 +38,11 @@ If you want to link the poller to the Centreon Server, click on **Apply**:
 Otherwise, if you want to link the poller to an existing Centreon Remote Server, select one from the list. Then click **Apply**:
 
 .. note::
-    If you want to change the direction of the flow between the Centreon Central Server and the poller, check the **Advanced: reverse Centreon
-    Broker communication flow** checkbox.
+    If you want to change the direction of the flow between the Centreon Server (or
+    the Remote Server and the Poller, check the **Advanced: reverse Centreon
+    Broker communication flow** checkbox. In this case, it will be necessary to
+    export the configuration of the collector as well as the server to which it
+    will be attached.
 
 In a few seconds the wizard will configure your new server.
 

doc/fr/administration_guide/poller/wizard_add_poller.rst

@@ -42,7 +42,8 @@ le Remote Server dans la liste et cliquez sur **Apply** :
 .. note::
     Si vous souhaitez changer le sens de connexion des données entre le serveur
     Centreon central et le collecteur, cochez la case **Advanced: reverse Centreon
-    Broker communication flow**.
+    Broker communication flow**. Dans ce cas, il sera nécessaire d'exporter la
+    configuration du collecteur ainsi que du serveur auquel il sera rattaché.
 
 Patientez quelques secondes, l'assistant va configurer votre nouveau serveur.