broken oauth: don't use symbols as session keys because rails stringifies all session keys

[igorbernstein]

oauth is broken on rails 3 because it stores its state in session[:oauth] which rails promptly converts to session['oauth']
the strategy fails to find its state during the callback_phase because session[:oauth] doesn't exist

[mbleigh]

Closed by 9243f80 - Use string session keys in oauth.rb

[igorbernstein]

I think stringify keys is recursive so
(session[:oauth]||={})[name.to_sym]
will fail because of the name symbol

[mbleigh]

OK, everything is stringed now, but as a warning I don't think this is a problem with Rails but must be with something else you're using. I've used OmniAuth with Rails 3 time and again without issue.