class HTTP::Connection

def start_tls(req, options)
  return unless req.uri.https? && !failed_proxy_connect?
  ssl_context = options.ssl_context
  unless ssl_context
    ssl_context = OpenSSL::SSL::SSLContext.new
    ssl_context.set_params(options.ssl || {})
  end
  @socket.start_tls(req.uri.host, options.ssl_socket_class, ssl_context)
end