weed/s3api: added new bucket handlers for more compatibility with AWS S3

Protocol

Otherwise any requests to the underlying handlers results in calls to
ListObjects (v1) that may intensively load gateway and volume servers.

Added the following handlers with default responses:
- GetBucketLocation
- GetBucketRequestPayment

Added the following handlers with NotFound and NotImplemented responses:
- PutBucketAcl
- GetBucketPolicy
- PutBucketPolicy
- DeleteBucketPolicy
- GetBucketCors
- PutBucketCors
- DeleteBucketCors

weed/s3api/s3api_xsd_generated.go

@@ -646,6 +646,10 @@ type ListVersionsResult struct {
 	CommonPrefixes      []PrefixEntry     `xml:"http://s3.amazonaws.com/doc/2006-03-01/ CommonPrefixes,omitempty"`
 }
 
+type LocationConstraint struct {
+	LocationConstraint string `xml:"http://s3.amazonaws.com/doc/2006-03-01/ LocationConstraint"`
+}
+
 type LoggingSettings struct {
 	TargetBucket string            `xml:"http://s3.amazonaws.com/doc/2006-03-01/ TargetBucket"`
 	TargetPrefix string            `xml:"http://s3.amazonaws.com/doc/2006-03-01/ TargetPrefix"`