Use the NetUtil netty alpha6 offers instead of reading network interfaces ourself

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Describe the new feature

In netty 5 alpha6 a NetUtil is added that allows us to read the network interfaces therefore we can remove our own util methods.

Why do you need this feature?

If netty is already providing and maintaining such methods we do not have to do the same work on our own.

Alternatives

Provide and maintain our own methods

Other

No response

Issue uniqueness

• [X] Yes, this issue is unique. There are no similar issues.