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/s3err/s3api_errors.go

@@ -51,6 +51,8 @@ const (
 	ErrBucketAlreadyExists
 	ErrBucketAlreadyOwnedByYou
 	ErrNoSuchBucket
+	ErrNoSuchBucketPolicy
+	ErrNoSuchCORSConfiguration
 	ErrNoSuchLifecycleConfiguration
 	ErrNoSuchKey
 	ErrNoSuchUpload
@@ -164,6 +166,16 @@ var errorCodeResponse = map[ErrorCode]APIError{
 		Description:    "The specified bucket does not exist",
 		HTTPStatusCode: http.StatusNotFound,
 	},
+	ErrNoSuchBucketPolicy: {
+		Code:           "NoSuchBucketPolicy",
+		Description:    "The bucket policy does not exist",
+		HTTPStatusCode: http.StatusNotFound,
+	},
+	ErrNoSuchCORSConfiguration: {
+		Code:           "NoSuchCORSConfiguration",
+		Description:    "The CORS configuration does not exist",
+		HTTPStatusCode: http.StatusNotFound,
+	},
 	ErrNoSuchLifecycleConfiguration: {
 		Code:           "NoSuchLifecycleConfiguration",
 		Description:    "The lifecycle configuration does not exist",