Comment # 2 on bug 1226157 from Giacomo Comes

Hi Samuel,
the /usr/etc migration normally means that files that were in /etc
(/etc/sssd/sssd.conf) can be found now in /usr/etc (/usr/etc/sssd/sssd.conf)
Examples: nsswitch.conf, idmapd.conf, sshd_config, login.defs, just to mention
fews.
This didn't happen with sssd. /etc/sssd/sssd.conf was simply removed.
And that is the only mention available in the changelog.

No-were is said that the user has to create /etc/sssd/sssd.conf anyway and with
the appropriate permission in order to make sssd work. It is this lack of
information that I was complaining about.
I have been using sssd for a long time and it took to me some digging in order
to understand what was going on. Imagine a user which is going to use sssd for
the first time on Leap 15.6 how he will feel.

Now if you are going the add some documentation to the package or not, it's up
to you. I think there is a lack of information, and my job was to report it.