dns/kadnode: update 2.3.0 -> 2.4.1, un-deprecate

Upstream is alive and active, has 1-st class FreeBSD support.
They had switched to mbedtls3 since version 2.4.0.
Using their ready-to-use port with minor changes:

• Fix files/kadnode.in mode (0755 -> 0644)
• Improve pkg-descr
• Some linting

PR: 283954
Reviewed by: diizzy
Approved by: moritzwarning@web.de (maintainer)