Instiki 0.17.2: Security Release

This release upgrades Instiki to Rails 2.3.4, which
patches two security holes in Rails. See

  http://weblog.rubyonrails.org/2009/9/4/ruby-on-rails-2-3-4

There are also some new features, and the usual boatload
of bugfixes. See the CHANGELOG for details.

vendor/rails/actionpack/lib/action_controller.rb

@@ -31,12 +31,8 @@ rescue LoadError
   end
 end
 
-begin
-  gem 'rack', '~> 1.1.0'
-  require 'rack'
-rescue Gem::LoadError
-  require 'action_controller/vendor/rack-1.1.pre/rack'
-end
+gem 'rack', '~> 1.0.0'
+require 'rack'
 
 module ActionController
   # TODO: Review explicit to see if they will automatically be handled by