How does system upgrade handle files in /etc ?
I understand ArchLinux is easily upgraded from one release to the next. My question is, how does an entire system upgrade handle the files in /etc ? For instance, in FreeBSD when I do a "make world" from version 6.0 to version 6.1, it does a diff on those files in /etc that have had things added to them in the new release and allows me to add those things in manually so that I don't mess up the changes I've made. What happens when you upgrade ArchLinux from an old release to the latest and the new release has things that it has changed in /etc ?