anchor.diff:  
         extraPort = mkOption {
           default = "7117";
  +        type = types.str;
           description = "
             Extra port to avoid filtering.
           ";
  
positive.code: 
        sid = mkOption {
          default = "0NL";
          description = "
            IRCD server unique ID in a net of servers.
          ";
  
negative.code: 
        description = mkOption {
          default = "Hybrid-7 IRC server.";
          type = types.str;
          description = "
            IRCD server description.
          ";
  