[Xymon] Modern MacOS Client

Hi all.  I've completed my current journey of building a MacOS Xymon Client. The script and instructions can be found here. https://krisspringer.com/posts/xymon-client-for-macos.php

I may package it up into a DMG download for easy clickable installation in the future.  We'll see how it goes.

Thanks to all the collaborators, Kris Springer