anchor.diff:          user        = ${srv.user}
           server      = ${srv.server}
           ${optionalString (srv.serverArgs != "") "server_args = ${srv.serverArgs}"}
  +        ${srv.extraConfig}
         }
       '';
   
  
positive.code:         log_type       = SYSLOG daemon info
          log_on_failure = HOST
          log_on_success = PID HOST DURATION EXIT
        }
  
        ${concatMapStrings makeService cfg.services}
  
negative.code:           '';
          };
  
          extraConfig = mkOption {
            type = types.string;
            default = "";
            description = "Extra configuration-lines added to the section of the service.";
          };
  
        };
  
      };
  