S3 ioGetDirectoryListing() - use getS3Path()

change
<cfset var s3path = "s3://#arguments.config.accessKeyId#:#arguments.config.awsSecretKey#@#arguments.config.bucket##lcase(arguments.config.pathPrefix)##lcase(arguments.dir)#" />

To
<cfset var s3path = getS3Path(config=arguments.config,file=arguments.dir) />