Change $result and return false to give a definitive answer, otherwise
the built-in rate limiting checks are used, if enabled.
+'PreferencesUserInformationPanel': Add HTML bits to user information list in preferences form
+$form : PreferencesForm object
+&$html : HTML to append to
+
'SiteNoticeBefore': Before the sitenotice/anonnotice is composed
&$siteNotice: HTML returned as the sitenotice
Return true to allow the normal method of notice selection/rendering to work,