I noticed that https://github.com/raoulbhatia/backuppc copies https://metacpan.org/pod/SCGI and https://metacpan.org/pod/SCGI::Request into the backuppc source code. I packaged those modules in a new libscgi-perl package so that they can be brought in as dependencies instead. I need a sponsor to get it submitted, however: https://bugs.debian.org/963105