<fieldset>
    <legend class="screen-reader-text"><?php _e('Additional robots.txt rules','xml-sitemap-feed'); ?></legend>

	<label for="xmlsf_robots"><?php printf(__('Rules that will be appended to the %s generated by WordPress:','xml-sitemap-feed'),'<a href="'.trailingslashit(get_bloginfo('url')).'robots.txt" target="_blank">robots.txt</a>'); ?></label>
    <br/>
	<textarea name="xmlsf_robots" id="xmlsf_robots" class="large-text" cols="50" rows="6"><?php echo esc_attr( trim( get_option('xmlsf_robots','') ) ); ?></textarea>
</fieldset>