RSS Feeds determines the behavior taken when a RSS or Atom feed is
encountered during a walk, either by directly linking or an embedded <link
rel="alternate">.
Follow Links Only(default) - Links listed in the feed are
followed, but the text content feed itself is not indexed.
Index Content and Follow Links - Links listed in the feed are
followed, and the feed itself is considered searchable content. The title and
description of the feed are indexed, as well as the titles of the entries in
the feed.
