Disable registration for users in all courses from Resume Session page - refs BT#19993

When session_course_users_subscription_limited_to_session_users is enabled

main/install/configuration.dist.php

@@ -2236,7 +2236,8 @@ INSERT INTO `extra_field` (`extra_field_type`, `field_type`, `variable`, `displa
 // they are only accessible during the active duration).
 //$_configuration['session_coach_access_after_duration_end'] = false;
 
-// Restrict the list of students to subscribe in the course session
+// Restrict the list of students to subscribe in the course session. And disable
+// registration for users in all courses from Resume Session page
 //$_configuration['session_course_users_subscription_limited_to_session_users'] = false;
 
 // Disable tab to add classes in course session for non-admins

main/session/add_users_to_session.php

@@ -325,13 +325,15 @@ if (isset($_POST['form_sent']) && $_POST['form_sent']) {
 
     if ($form_sent == 1) {
         //$notEmptyList = api_get_configuration_value('session_multiple_subscription_students_list_avoid_emptying');
+        $isLimited = api_get_configuration_value('session_course_users_subscription_limited_to_session_users');
 
         // Added a parameter to send emails when registering a user
         SessionManager::subscribeUsersToSession(
             $id_session,
             $UserList,
             null,
-            false
+            false,
+            false === $isLimited
         );
         Display::addFlash(Display::return_message(get_lang('Updated')));
         header('Location: resume_session.php?id_session='.$id_session);