[ruby-dev:29945], [ruby-dev:34095]

* lib/win32/registry.rb (Win32::Registry.expand_environ): try upcased
  name too for cygwin.  [ruby-dev:29945]

* lib/win32/resolv.rb (Win32::Resolv.get_hosts_path): use expand_path.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@15823 b2dd03c8-39d4-4d8f-98ff-823fe69b080e