fix backwards-compatibility with ancient Net::HTTP. [Bug #6889] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36810 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
[ruby-trunk - Feature #6435] * lib/net/http/backward.rb: ditto. * lib/net/http/response.rb: ditto. * lib/net/http/exceptions.rb: ditto. * lib/net/http/responses.rb: ditto. * lib/net/http/generic_request.rb: ditto. * lib/net/http/header.rb: ditto. * lib/net/http/request.rb: ditto. * lib/net/http/proxy_delta.rb: ditto. * lib/net/http/requests.rb: ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e