Code review comment for ~ahasenack/ubuntu/+source/samba:groovy-samba-4.12.2-update

I found many reports of these pidl warnings in the samba bugzilla. Most are old, and some closed as "wontfix". Here is one example that as a response from upstream saying these issues are known and will be fixed eventually:

https://bugzilla.samba.org/show_bug.cgi?id=12634
"""
We get these warnings on every platform on every build, so we know about them and have already given them the correct attention. Most are long-term 'could be better' rather than 'must fix soon'.
"""