Can't get all available buckets.

I try to use s4cmd as a s3cmd, something like this:

./s4cmd -p /home/user/.s3cfg ls s3
i see my bucket's list
./s4cmd -p /home/user/.s3cfg-n ls s3
[Invalid Argument] Invalid parameter: s3, s3 path expected
./s4cmd -p /home/user/.s3cfg-n ls s3://\*
[Errno -2] Name or service not known
[Errno -2] Name or service not known thread(s)]
[Errno -2] Name or service not known thread(s)]

How can I get all my buckets?

No file, test, or entry point is named. Reproduce the two `s4cmd ls` commands from the issue, then trace how `ls` parses S3 paths and requests bucket listings; done means a supported way to list all available buckets is identified and covered by an appropriate test or documented behavior.

Written by the indexing model from the issue text.