Some time ago (before 1.0?), each framework inside rails has its own
address for API documentation (such as ar.rubyonrails.org for
ActiveRecord). Now, the only address that works is api.rubyonrails.org.
Is this correct? I think there are too many links pointing to
ar.rubyonrails.org (and to the others) and no reason to show the
homepage instead the specific API