Merge remote-tracking branch 'github/rack-1.x' into 2-3-github

Some pretty gnarly bugs and security issues are present in the
latest rack 1.1.x release. There are 1.2.x and 1.3.x releases that
correct these.

This changes the gem dependencies to allow for rack versions > 1.1.
At GitHub we're on 1.2.4 (latest 1.2.x release at present) and
should have some results from real world testing soon.

actionpack/Rakefile

@@ -79,7 +79,7 @@ spec = Gem::Specification.new do |s|
   s.requirements << 'none'
 
   s.add_dependency('activesupport', '= 2.3.14' + PKG_BUILD)
-  s.add_dependency('rack', '~> 1.1.0')
+  s.add_dependency('rack', '~> 1.1')
 
   s.require_path = 'lib'
 

actionpack/lib/action_controller.rb

@@ -31,7 +31,7 @@ rescue LoadError
   end
 end
 
-gem 'rack', '~> 1.1.0'
+gem 'rack', '~> 1.1'
 require 'rack'
 require 'action_controller/cgi_ext'