Hi,
From what I understand the FCGI wrapper was used as CGI through e.g.
fcgiwrap, and upstream recommended to switch to fcgi-spawn following
https://sympa-community.github.io/manual/install/configure-http-server-spawnfcgi.html
Carsten agreed and suggested we add a note about this in the Debian
documentation, so I plan to add a note in README.Debian or NEWS.Debian.
https://github.com/sympa-community/sympa/issues/1020#issuecomment-710763168
Given there were no other reports I believe this addresses the issue.
Cheers!
Sylvain Beucler
Debian LTS Team