S3 storage mode is not working in some AWS regions

[ghyster]

S3 storage mode doesn't work for AWS regions not supporting requests signature version 2. Tested on eu-central-1, here is the exception in the logs

org.jclouds.http.HttpResponseException: request: HEAD https://s3-eu-central-1.amazonaws.com/redacted HTTP/1.1 failed with response: HTTP/1.1 400 Bad Request

same setup on eu-west-1 is working

jclouds supports V4 signature in the version included in linshare

I don't have much time to work on this mostly because I'm new to linshare. If the effort is light I'd appreciate some pointers to fix this