Is there a policy for Ubuntu developers/package maintainers about commenting changes to values in configuration files? I'm asking because the upgrade from 16.04 to 16.10 apparently changed
/etc/nsswitch.conf to include
hosts: files resolve [!UNAVAIL=return] dns myhostname
hosts: files dns
and I have no idea what that means - and it would be KISS to have a comment right in the file. The change might have other reasons, but for the sake of the question lets assume it was changed by the update (if someone has a better example I'll edit the question).
I'm asking because I'm configuring my system with a system of templates which diff the result of variable substitution/the output of the template with the currently existing file and enforce confirmation so I have a change to incorporate changes to default values into the template.