MDL-10965 courses: capability to browse course list

lib/accesslib.php

@@ -1948,6 +1948,11 @@ function can_access_course(stdClass $course, $user = null, $withcapability = '',
         return true;
     }
 
+    if (!core_course_category::can_view_course_info($course)) {
+        // No guest access if user does not have capability to browse courses.
+        return false;
+    }
+
     // if not enrolled try to gain temporary guest access
     $instances = $DB->get_records('enrol', array('courseid'=>$course->id, 'status'=>ENROL_INSTANCE_ENABLED), 'sortorder, id ASC');
     $enrols = enrol_get_plugins(true);