module Roda::RodaPlugins::Middleware

roda middleware in the same application.
You should only need to override this if you are using multiple
application that the current request is a middleware request.
:env_var :: Set the environment variable to use to indicate to the roda
Configure the middleware plugin. Options:

def self.configure(app, opts={})
  app.opts[:middleware_env_var] = opts[:env_var] if opts.has_key?(:env_var)
  app.opts[:middleware_env_var] ||= 'roda.forward_next'
end