Upgrade to Rails 2.2.0

As a side benefit, fix an (non-user-visible) bug in display_s5().
Also fixed a bug where removing orphaned pages did not expire cached summary pages.

vendor/rails/activesupport/test/secure_random_test.rb

@@ -0,0 +1,19 @@
+require 'abstract_unit'
+
+class SecureRandomTest < Test::Unit::TestCase
+  def test_random_bytes
+    b1 = ActiveSupport::SecureRandom.random_bytes(64)
+    b2 = ActiveSupport::SecureRandom.random_bytes(64)
+    assert_not_equal b1, b2
+  end
+
+  def test_hex
+    b1 = ActiveSupport::SecureRandom.hex(64)
+    b2 = ActiveSupport::SecureRandom.hex(64)
+    assert_not_equal b1, b2
+  end
+
+  def test_random_number
+    assert ActiveSupport::SecureRandom.random_number(5000) < 5000
+  end
+end