anchor.diff:                  <para>
                     Regular bridge. Works like a regular relay, but
                     doesn't list you in the public relay directory and
  -                  hides your Tor node behind obfsproxy.
  +                  hides your Tor node behind obfs4proxy.
                   </para>
   
                   <para>
  
positive.code: 
      ${optionalString (elem cfg.relay.role ["bridge" "private-bridge"]) ''
        BridgeRelay 1
        ServerTransportPlugin obfs2,obfs3 exec ${pkgs.pythonPackages.obfsproxy}/bin/obfsproxy managed
        ExtORPort auto
        ${optionalString (cfg.relay.role == "private-bridge") ''
          ExtraInfoStatistics 0
  
negative.code:             </varlistentry>
              </variablelist>
            '';
          };
  
          bridgeTransports = mkOption {
            type = types.listOf types.str;
            default = ["obfs4"];
            example = ["obfs2" "obfs3" "obfs4" "scramblesuit"];
            description = "List of pluggable transports";
          };
  
          nickname = mkOption {
  