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/s3-error.go

@@ -58,4 +58,5 @@ var s3ErrorResponseMap = map[string]string{
 	"InvalidDuration":                   "Duration provided in the request is invalid.",
 	"XAmzContentSHA256Mismatch":         "The provided 'x-amz-content-sha256' header does not match what was computed.",
 	// Add new API errors here.
+	"NoSuchCORSConfiguration": "The CORS configuration does not exist",
 }