In a server with several packages installed (nginx, php, etc) and configured with .conf files how can I avoid problems with updates that introduce new config parameters? Currently whenever I update, my old config is renamed or overwritten and I have to manually merge the two, which can be tedious.
I develop with SublimeText2 and like how it has Settings - Default and Settings - User separate so I can override settings that I actually want to modify and leave everything else default. Is there a way I could easily do something like this with the packages I install?
Btw, I'm using CentOS 6.