upgrade mailman to mailman 3 or retire
Mailman 2 was removed from Debian bullseye, we need to either upgrade to Mailman 3 or get rid of it. This is part of the 2022-Q1/Q2 OKRs and the %Debian 11 bullseye upgrade milestone.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information