Ruby

merge from trunk (r28354)

    * lib/webrick/httpservlet/filehandler.rb
      (prevent_directory_traversal): apply filesystem encoding to path
      only during calling File.expand_path.  [ruby-dev:41423]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@28372 b2dd03c8-39d4-4d8f-98ff-823fe69b080e