Register multiple URLs to the same handler

[amitguptagwl]

As per the current implementation, we can map only one URL to one handler.

router.on('GET', '/', (req, res, params) => {
  //process the request response here
})

We want to support and an array of URL in the above method. So that multiple URLs can be registered at a time.

router.on('GET', ['/404.html', '/503.html', 'anyerror.html' ], (req, res, params) => {
  //process the request response here
})

[ghost]

I will have a look.