Request to add a top private domain mode as seen in google's guava.

[t0xodile]

https://guava.dev/releases/32.1.1-jre/api/docs/com/google/common/net/InternetDomainName.html#topPrivateDomain()

Would be very helpful. "Returns the portion of this domain name that is one level beneath the public suffix. For example, for x.adwords.google.co.uk it returns google.co.uk, since co.uk is a public suffix. Similarly, for myblog.blogspot.com it returns the same domain, myblog.blogspot.com, since blogspot.com is a public suffix."

Public Suffixes. Apex works in some cases but not all.

Basically the mode should check the above list, and then pull out the domain right before that. A good example is
something.somethingelse.azurewebsites.net.

Apex mode would output azurewebsites.net.
Top private domain mode, would output somethingelse.azurewebsites.net.

Hope that makes sense.
\Tom