WP Multisite Domain Mapping

Hi,

I’ve created a Multisite Setup WordPress and i would like to do domain mapping?
My domain provider is GoDaddy.

For example, my primary domain is mydomain.com
and i have another domain called mynewsite.com

if you create a subsite under mydomain.com, the default url is http://mydomain.com/mynewsite

i would like to use my other domain to access the other one. so it will be http://mynewsite.com pointing to the subsite i have.

How do i do this with godaddy and wordpress?

Thanks!