Radicale no longer supports crypt password
Issue description
The version of Radicale in NixOS 20.09 does no longer support crypt password because they are apparently “insecure” (yet is supports plaintext auth, wat?). Therefore it is suggested to switch to bcrypt password which is not a problem at all, because luckily dovecot supports bcrypt as well. To generate a bcrypt password hash:
$ cat <<EOF | nix-shell -p python3Packages.passlib --run bash
python -c 'from passlib.hash import bcrypt; print(bcrypt.hash("foobar"))'
EOF
Since this is not really an issue in NixOS mailserver but only the associated documentation, I hope you forgive me for ignoring the template.