Hi Lee, Ondrej, Salvatore
I didn't follow up on this because your backport of the configuration settings was done after my original message in August: the 9.16.50-1~deb11u2 version, which landed during my holiday break.
Since then, we are able to set the appropriate configuration settings to enable more than 100 SRV records and our Bind9 instance is running fine.
So on my side this is fixed, and I thank the maintainers for having backported the config options.
My original complaint was that we had a functional regression in a security update, and no way of recovering a working bind9 without these configuration settings. We had to resort to pin an older version (the -48 version), and Ondrej what you did with deb11u2 fixed our issue.
Thank you for looking back at this thread anyway. Bookworm is in our sights so we'll have a more recent version of the package.
Guillaume