Hi, Thanks for writing the KIP.
I have a couple questions: * you propose to show a warning first as otherwise it would be a breaking change. Does it mean that it would be possible to get the warning, but the KS application would still be functional? * do we really want to validate the server address? It's pretty hard to write a regex that covers all possibilities and is not overly permissive. For example the proposed `IPV4` regex in the KIP doesn't allow 127.0.0.1. Also the address can be technically valid, but unreachable or non-existent.
