Regarding the missing explanation of LCH, and the tutorials linking to each other, that’s on my “to do” list for when I rewrite the first tutorial. Regarding section C2, you are absolutely right, that figure is far too “busy”, too much going on at once. I will separate out the threads and try again.
Thank you! for taking the time to read these tutorials and make suggestions.
It will be awhile before I can make the next effort at improving the tutorials, both from not typing too much at once to avoid stressing my wrist, and also because for various reasons I decided to swtch from Gentoo and IceWM (which I’ve used for roughly 4 and 10 years now) to OpenSuse and Plasma 5 - that’s a rough transition and I haven’t yet managed to get an Apache test server up and running.