Specify the S3 permissions needed for each operation in the doc

[brendan-rius]

I wanted to sync a folder. It works with s3cmd with the following permissions:

• s3:ListBucket
• s3:PutObject
• s3:PutObjectAcl

After trying with s4cmd I have a 403 Access Denied which I guess comes from permissions. Can you add the needed permissions for each operation in the doc please?

[brendan-rius]

A small file from the folder has been uploaded successfully though. I guess it is probably related to the multipart upload, and thus the multipart permissions.

[brendan-rius]

It works after adding:

• s3:ListMultipartUploadParts
• s3:AbortMultipartUpload
• s3:ListBucketMultipartUploads

I do not know if everything in the list is useful though