Support multiple instances of transport

Allows the use of name so that multiple instances of the transport is possible.

      new (winston.transports.FileRotateDate)({
        name: "ops_log",
        level: "info",
        filename: /var/log/ops.log,
        timestamp: true,
        json: false,
        maxsize: 26214400
      }),
      new (winston.transports.FileRotateDate)({
        name: "user_log",
        level: "user",
        filename: /var/log/user.log,
        timestamp: true,
        json: false,
        maxsize: 26214400
      })