This function has been deprecated, please use post_comments_feed_link().
Much like an RSS feed for your WordPress blog, this feature will display a link to the RSS feed for a given post's comments. By implementing the feature, your readers will be able to track the comment thread for a given post, perhaps encouraging them to stay connected to the conversation.
This tag must be within The Loop, or the loop set up for comments.
<?php comments_rss_link('text', 'file'); ?>
Displays the link to the comment's RSS feed, using "comment feed" as the link text.
<?php comments_rss_link('comment feed'); ?>