(docs) Document that 'reports = none' disables reporting

Author: natemccurdy

lib/puppet/defaults.rb

@@ -1517,7 +1517,9 @@ def self.initialize_default_settings!(settings)
         See the report reference for information on the built-in report
         handlers; custom report handlers can also be loaded from modules.
         (Report handlers are loaded from the lib directory, at
-        `puppet/reports/NAME.rb`.)",
+        `puppet/reports/NAME.rb`.)
+
+        To turn off reports entirely, set this to `none`",
     },
     :reportdir => {
       :default => "$vardir/reports",