anchor.diff:        kexAlgorithms = mkOption {
           type = types.listOf types.str;
           default = [
  +          "curve25519-sha256"
             "curve25519-sha256@libssh.org"
             "diffie-hellman-group-exchange-sha256"
           ];
  
positive.code:           Defaults to recommended settings from both
            <link xlink:href="https://stribika.github.io/2015/01/04/secure-secure-shell.html" />
            and
            <link xlink:href="https://wiki.mozilla.org/Security/Guidelines/OpenSSH#Modern_.28OpenSSH_6.7.2B.29" />
          '';
        };
  
  
negative.code:           Defaults to recommended settings from both
            <link xlink:href="https://stribika.github.io/2015/01/04/secure-secure-shell.html" />
            and
            <link xlink:href="https://infosec.mozilla.org/guidelines/openssh#modern-openssh-67" />
          '';
        };
  
  