Server offline xen-git.uk.xensource.com

[mdlonline]

Getting this error when trying to bring up a vagrant box with xenserver as provider:
Couldn't resolve host 'xen-git.uk.xensource.com'

[teneri66]

Error message shown to me:

Could not resolve host: xen-git.uk.xensource.com

[teneri66]

e.g. https://app.vagrantup.com/jonludlam/boxes/xs-ubuntu-trusty it says "xenserver Externally hosted (xen-git.uk.xensource.com)"
And this server is not available. So need to build boxes on our own.