Empty Local Directory Created When Using UNC Path with dirname in DailyRotateFile

[rfgoncalves90]

When using a UNC path as the dirname option in DailyRotateFile, an empty directory is unexpectedly created in the root of the local drive (e.g., D:\SERVERNAME). This occurs even though the actual log files are correctly written to the specified UNC path.

new transports.DailyRotateFile({
  format: format.uncolorize(),
  filename: "logName",
  extension: ".log",
  dirname: "\\\\SERVERNAME\\logs",
  maxSize: "20m",
  maxFiles: "30d",
  zippedArchive: true
});

In this example:
Logs are correctly written to: \\SERVERNAME\logs
But an empty folder is also created at: D:\SERVERNAME