Fixes for root node resolution in a multi site context

[Naliath]

[ghost]

Could you create an issue that describes the issue you are addressing as well as reproduction steps for it?

Thanks for contributing!

[larsbj1988]

This is the issue: https://github.com/kipusoep/UrlTracker/issues/137

We are waiting for this fix on multiple sites :)

[enkelmedia]

This one is an easy merge =D Lookin forward to it!

[kunal999]

This won't work for sub-domains. We have a multi-lingual setup with the international language sites setup as sub-domains of the main English website domain. e.g. /mx for mexico region site. I don't think this solution accounts for the sub-domain as it is just relying on host name.

[cameleater]

How can I apply this fix on the urltracker package in my solution?