* lib/xmlrpc/server.rb (Server#serve): gets rid of hardcoded
  platform names.

* lib/resolv.rb (Resolv::Hosts::DefaultFileName),
  (Resolv::DNS::Config.default_config_hash): tries win32/resolv on
  mswin64 too.

* lib/rubygems/specification.rb (Gem::Specification#ruby_code):
  aded mswin64.

* lib/drb/extservm.rb (DRb::ExtServManager#invoke_service_command):
  spawn is better to start a process in background.

* ext/extmk.rb: uses FNM_SYSCASE.

* instruby.rb: installs win32.h on mswin64 platform.
  [ruby-core:21722]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e