region: Do not cause redirects re-write URLs for buckets for a specific region
region: Do not cause redirects re-write URLs for buckets for a specific region

setBucketRegion never returns any error anymore, since it could be possible that
the request is MakeBucket and the bucket doesn't exist. So setBucketRegion
does the best possible work to find the region, if not falls back to something
default.

awwalker/minio-go,harshavardhana/minio-go,minio/minio-go,abperiasamy/minio-go,donatello/minio-go