Add delete marker replication support (#10396)

Delete marker replication is implemented for V2
configuration specified in AWS spec (though AWS
allows it only in the V1 configuration).

This PR also brings in a MinIO only extension of
replicating permanent deletes, i.e. deletes specifying
version id are replicated to target cluster.

cmd/erasure-metadata.go

@@ -139,7 +139,9 @@ func (fi FileInfo) ToObjectInfo(bucket, object string) ObjectInfo {
 
 	// Add replication status to the object info
 	objInfo.ReplicationStatus = replication.StatusType(fi.Metadata[xhttp.AmzBucketReplicationStatus])
-
+	if fi.Deleted {
+		objInfo.ReplicationStatus = replication.StatusType(fi.DeleteMarkerReplicationStatus)
+	}
 	// etag/md5Sum has already been extracted. We need to
 	// remove to avoid it from appearing as part of
 	// response headers. e.g, X-Minio-* or X-Amz-*.
@@ -155,6 +157,7 @@ func (fi FileInfo) ToObjectInfo(bucket, object string) ObjectInfo {
 	} else {
 		objInfo.StorageClass = globalMinioDefaultStorageClass
 	}
+	objInfo.VersionPurgeStatus = fi.VersionPurgeStatus
 	// Success.
 	return objInfo
 }