Provide link to node option
Overrides User::buildOptionsForm
public function buildOptionsForm(&$form, &$form_state) {
parent::buildOptionsForm($form, $form_state);
$form['link_to_user'] = array(
'#title' => t('Link this field'),
'#type' => 'radios',
'#options' => array(
0 => t('No link'),
'user' => t('To the user'),
'mailto' => t("With a mailto:"),
),
'#default_value' => $this->options['link_to_user'],
);
}