An existing (and edited) squid.conf file got lost during upgrade to UCS 4.3 and was overwritten by a default configuration file from the package. There is no “.debian” or “.dist-upgrade” file at all.
As some changes have happened to the Squid configuration there has been some changes. The previous files have been moved to
/etc/squid3-update-4.3. You can copy your modified file from this backup folder.
Make sure you have the univention meta package installed in order to have such backup folder in future:
univention-install univention-squid (this applies for other packages, too!)
Instead of editing the configuration file (which might be overwritten by
ucr commit) use a
squid.local file to customize your setup.
This file will be read upon start of squid and does not get overwritten on updates.