title: URL to add Android Support Library to SDK Manager
body: <p>I accidentally deleted the <code>Android Support Library</code> from the <code>Extras</code> folder in my SDK Manager. To add this back, I thought finding the library URL (.xml) might help but I'm not able to track down that URL. Any help, I need to add this back so I can install the Support Library.</p>
  
  <p><a href="https://i.stack.imgur.com/58hwp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/58hwp.png" alt="The package used to be listed here"></a>
  <sub>Forgive my drawing</sub></p>
  
  <p>I'm on Mac OSX El Capitan (10.11.5)</p>