Add unit tests for Rack RequestHandler response handling
Add unit tests for Rack RequestHandler response handling

phusion/passenger,phusion/passenger,phusion/passenger,clemensg/passenger,clemensg/passenger,phusion/passenger,clemensg/passenger,clemensg/passenger,clemensg/passenger,clemensg/passenger,phusion/passenger,clemensg/passenger,phusion/passenger,phusion/passenger,phusion/passenger,clemensg/passenger