public function addHelpLink( $to, $overrideBaseUrl = false ) {
    global $wgContLang;
    $msg = $this->msg( $wgContLang->lc( $this->getName() ) . '' );//-helppage

    if ( !$msg->isDisabled() ) {
        $helpUrl = Skin::makeUrl( $msg->plain() );
        $this->getOutput()->addHelpLink( $helpUrl, true );
    } else {
        $this->getOutput()->addHelpLink( $to, $overrideBaseUrl );
    }
}