Enumerate use-cases.

[seporaitis]

List things like:

• Current and deprecated.
• Uses of credentials
• Uses of S3 buckets
• Uses of Proxies
• Else?

[seporaitis]

• SigV2 request signatures have been deprecated in 2019 ( S3 will stop accepting requests signed using SigV2 in all regions on June 24, 2019 #80)
• S3 bucket-in-path has been deprecated (S3 URL deprecation #79)
• Plugin is used with DNF (Using the s3 plugin with DNF #72)
• Plugin is used with S3-Website domains and dualstack domains (Add s3-website and dualstack url support #75)
• Plugin is used with China partition (?) of AWS (add support for cn-northwest-1 region #71, fails to work in cn-north-1 #51)
• Credentials from Assumed Role (Allow setting a token in the repo config #70), EC2 Instance Role, IAM Role, Hardcoded in Conf file, Anonymous
• Plugin is used with a proxy (Proxy support #58)
• Plugin is used inside EC2, inside ECS (Use boto3 to manage credentials #78) and outside EC2 (s3iam.py fails when running outside of EC2 #48)

[lining-ops]

hi @seporaitis , got same issue with #72 , any workround for the issue?
Thanks in advance
Lee