Upgrade to Rails 2.0.2

Upgraded to Rails 2.0.2, except that we maintain

   vendor/rails/actionpack/lib/action_controller/routing.rb

from Rail 1.2.6 (at least for now), so that Routes don't change. We still
get to enjoy Rails's many new features.

Also fixed a bug in Chunk-handling: disable WikiWord processing in tags (for real this time).

vendor/rails/actionpack/test/controller/http_authentication_test.rb

@@ -0,0 +1,54 @@
+require File.dirname(__FILE__) + '/../abstract_unit'
+
+class HttpBasicAuthenticationTest < Test::Unit::TestCase
+  include ActionController::HttpAuthentication::Basic
+  
+  class DummyController
+    attr_accessor :headers, :renders, :request
+    
+    def initialize
+      @headers, @renders = {}, []
+      @request = ActionController::TestRequest.new
+    end
+    
+    def render(options)
+      self.renders << options
+    end
+  end
+
+  def setup
+    @controller  = DummyController.new
+    @credentials = ActionController::HttpAuthentication::Basic.encode_credentials("dhh", "secret")
+  end
+
+  def test_successful_authentication
+    login = Proc.new { |user_name, password| user_name == "dhh" && password == "secret" }
+    set_headers
+    assert authenticate(@controller, &login)
+
+    set_headers ''
+    assert_nothing_raised do
+      assert !authenticate(@controller, &login)
+    end
+
+    set_headers nil
+    set_headers @credentials, 'REDIRECT_X_HTTP_AUTHORIZATION'
+    assert authenticate(@controller, &login)
+  end
+
+  def test_failing_authentication
+    set_headers
+    assert !authenticate(@controller) { |user_name, password| user_name == "dhh" && password == "incorrect" }
+  end
+  
+  def test_authentication_request
+    authentication_request(@controller, "Megaglobalapp")
+    assert_equal 'Basic realm="Megaglobalapp"', @controller.headers["WWW-Authenticate"]
+    assert_equal :unauthorized, @controller.renders.first[:status]
+  end
+
+  private
+    def set_headers(value = @credentials, name = 'HTTP_AUTHORIZATION')
+      @controller.request.env[name] = value
+    end
+end