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/railties/lib/commands/servers/thin.rb

@@ -0,0 +1,25 @@
+require 'rbconfig'
+require 'commands/servers/base'
+require 'thin'
+
+
+options = ARGV.clone
+options.insert(0,'start') unless Thin::Runner.commands.include?(options[0])
+
+thin = Thin::Runner.new(options)
+
+puts "=> Rails #{Rails.version} application starting on http://#{thin.options[:address]}:#{thin.options[:port]}"
+puts "=> Ctrl-C to shutdown server"
+
+log = Pathname.new("#{File.expand_path(RAILS_ROOT)}/log/#{RAILS_ENV}.log").cleanpath
+open(log, (File::WRONLY | File::APPEND | File::CREAT)) unless File.exist? log
+tail_thread = tail(log)
+trap(:INT) { exit }
+
+begin
+  thin.run!
+ensure
+  tail_thread.kill if tail_thread
+  puts 'Exiting'
+end
+