title: Add custom field to Magento Admin (URL field)
body: <p>I'm trying to add a custom field in the Magento backend, at the Configuration -> Web section. I want to add an additional URL text space (can be in any of the sections, URL options, for example, would work well). How can I do that? I have seen other people who tried it by making a custom module, but that was for the category section. I need it at the Web section though, have not had success yet.</p>
  
  <p>Thank you!</p>