+api
+---
+
+Options for the Twitter-like API.
+
+realm: HTTP Basic Auth realm (see http://tools.ietf.org/html/rfc2617
+ for details). Some third-party tools like ping.fm want this to be
+ 'Identi.ca API', so set it to that if you want to. default = null,
+ meaning 'something based on the site name'.
+
+nofollow
+--------
+
+We optionally put 'rel="nofollow"' on some links in some pages. The
+following configuration settings let you fine-tune how or when things
+are nofollowed. See http://en.wikipedia.org/wiki/Nofollow for more
+information on what 'nofollow' means.
+
+subscribers: whether to nofollow links to subscribers on the profile
+ and personal pages. Default is true.
+members: links to members on the group page. Default true.
+peopletag: links to people listed in the peopletag page. Default true.
+external: external links in notices. One of three values: 'sometimes',
+ 'always', 'never'. If 'sometimes', then external links are not
+ nofollowed on profile, notice, and favorites page. Default is
+ 'sometimes'.
+
+url
+---
+
+Everybody loves URL shorteners. These are some options for fine-tuning
+how and when the server shortens URLs.
+
+shortener: URL shortening service to use by default. Users can override
+ individually. 'ur1.ca' by default.
+maxlength: If an URL is strictly longer than this limit, it will be
+ shortened. Note that the URL shortener service may return an
+ URL longer than this limit. Defaults to 25. Users can
+ override. If set to 0, all URLs will be shortened.
+maxnoticelength: If a notice is strictly longer than this limit, all
+ URLs in the notice will be shortened. Users can override.
+ -1 means the text limit for notices.
+
+router
+------
+
+We use a router class for mapping URLs to code. This section controls
+how that router works.
+
+cache: whether to cache the router in memcache (or another caching
+ mechanism). Defaults to true, but may be set to false for
+ developers (who might be actively adding pages, so won't want the
+ router cached) or others who see strange behavior. You're unlikely
+ to need this unless you're a developer.
+
+