Add InetAddressAdapter for serialization of all InetAddress variations

[Mechite]

Perhaps adding a usage for valid IPv4 and IPv6 serialization/de-serialization, in blackbox-test, would be desired.

[rbygrave]

valid IPv4 and IPv6 serialization/de-serialization, in blackbox-test

Yes please.

[Mechite]

This has been done, and by extension I implemented support for Inet4Address and Inet6Address.

I have seen beans be created with these directly used, and they are part of public API.

However, it appears not ideal practice to use them unless one depends on their unique methods, rather than the abstraction, but supporting them is trivial, and I did see it used many times, maybe not even for the unique methods, but rather to just specify in the model of a bean whether the expected IP is IPv4 or IPv6.

The JDK network API is designed to be generic and support both IPv4 and IPv6 without favoring one over the other, but this has proven over time to not be good practice.
Explicit control is generally desired, hence the use of these, and hence them remaining public API and not just an implementation detail