Renaming local edits out of the way or preserving them is up to you, depending on whether you put %config or %config(noreplace) in the spec. It does need to be

Renaming local edits out of the way or preserving them is up to you, depending on whether you put %config or %config(noreplace) in the spec. It does need to be handled carefully, but it can be handy if you want one machine giving special treatment to a representative sample of your requests or something.