Move autoload to toplevel

So that classes which uses Net::HTTP with https can use OpenSSL
namespace for example exception classes like OpenSSL::SSL::SSLError.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66401 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/net/http.rb

@@ -22,9 +22,9 @@
 
 require_relative 'protocol'
 require 'uri'
+autoload :OpenSSL, 'openssl'
 
 module Net   #:nodoc:
-  autoload :OpenSSL, 'openssl'
 
   # :stopdoc:
   class HTTPBadResponse < StandardError; end