Update Vendored Rack to 1.2.0

Also update tests for itextomml 1.3.25.

vendor/plugins/rack/spec/spec_static.rb

@@ -0,0 +1,33 @@
+require 'rack/static'
+require 'rack/mock'
+
+class DummyApp
+  def call(env)
+    [200, {}, ["Hello World"]]
+  end
+end
+
+describe Rack::Static do
+  root = File.expand_path(File.dirname(__FILE__))
+  OPTIONS = {:urls => ["/cgi"], :root => root}
+
+  @request = Rack::MockRequest.new(Rack::Static.new(DummyApp.new, OPTIONS))
+
+  it "serves files" do
+    res = @request.get("/cgi/test")
+    res.should.be.ok
+    res.body.should =~ /ruby/
+  end
+
+  it "404s if url root is known but it can't find the file" do
+    res = @request.get("/cgi/foo")
+    res.should.be.not_found
+  end
+
+  it "calls down the chain if url root is not known" do
+    res = @request.get("/something/else")
+    res.should.be.ok
+    res.body.should == "Hello World"
+  end
+
+end