title: Scala Play Framework, How to handle unknown url
body: <p>Hey i am working on scala play framework, what i need to do is, when someone enter some <code>random(unknown) url</code>, that is not defined in routes file, they need to be routed to the some another not found page, with <code>404 page not found http header response</code>. instead of displaying the whole routes file as error.</p>
  
  <p>using sbt : <code>sbt launcher version 0.13.8</code></p>
  
  <p>using scala : <code>scalaVersion := "2.11.6"</code>
  using play framework 2x</p>
  
  <p><a href="https://i.stack.imgur.com/Hi6nU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Hi6nU.png" alt="Action not found"></a></p>