Add note about still not being fully compatible with Rack
Add note about still not being fully compatible with Rack

coinbase/faraday,lostisland/faraday,lostisland/faraday,prcongithub/faraday,stayhero/faraday,stayhero/faraday,ngpestelos/faraday,pvdb/faraday,AvaelKross/faraday,davoclavo/faraday,prcongithub/faraday,davoclavo/faraday,pvdb/faraday,AvaelKross/faraday,coinbase/faraday,ngpestelos/faraday