title: Using capybara/webkit with a proxy?
body: <p>I'm using capybara/webkit to emulate a browser, but I don’t know how to specify a proxy to use in the code:</p>
  
  <pre><code>require 'capybara'
  require 'capybara/dsl'
  require 'capybara/webkit'
  Capybara.run_server = false
  Capybara.current_driver = :webkit
  include Capybara::DSL
  Capybara.app_host = "http://test.com"
  page.driver.allow_url("*")
  visit('/')
  
  # set_proxy('12.13.14.15', '4521')
  </code></pre>
  
  <p>Can anyone advise?
  Thanks in advance.</p>