dns/kadnode: Update to 2.2.2

• Fix variable order in the rc script so that kadnode can actually start which I broke before ports r470325 [1]

Changes: https://github.com/mwarning/KadNode/releases/tag/v2.2.2
PR: 228368
Pointy hat: tobik [1]
Submitted by: moritzwarning@web.de (maintainer)