added underscore to separators 
added underscore to separators 

http://docs.aws.amazon.com/AmazonS3/latest/dev/BucketRestrictions.html "The rules for bucket names in the US East (N. Virginia) region allow bucket names to be as long as 255 characters, and bucket names can contain any combination of uppercase letters, lowercase letters, numbers, periods (.), hyphens (-), and underscores (_). "
theanti9/s3knock