Support bucket versioning (#9377)

- Implement a new xl.json 2.0.0 format to support,
  this moves the entire marshaling logic to POSIX
  layer, top layer always consumes a common FileInfo
  construct which simplifies the metadata reads.
- Implement list object versions
- Migrate to siphash from crchash for new deployments
  for object placements.

Fixes #2111

cmd/bitrot.go

@@ -30,25 +30,6 @@ import (
 // magic HH-256 key as HH-256 hash of the first 100 decimals of π as utf-8 string with a zero key.
 var magicHighwayHash256Key = []byte("\x4b\xe7\x34\xfa\x8e\x23\x8a\xcd\x26\x3e\x83\xe6\xbb\x96\x85\x52\x04\x0f\x93\x5d\xa3\x9f\x44\x14\x97\xe0\x9d\x13\x22\xde\x36\xa0")
 
-// BitrotAlgorithm specifies a algorithm used for bitrot protection.
-type BitrotAlgorithm uint
-
-const (
-	// SHA256 represents the SHA-256 hash function
-	SHA256 BitrotAlgorithm = 1 + iota
-	// HighwayHash256 represents the HighwayHash-256 hash function
-	HighwayHash256
-	// HighwayHash256S represents the Streaming HighwayHash-256 hash function
-	HighwayHash256S
-	// BLAKE2b512 represents the BLAKE2b-512 hash function
-	BLAKE2b512
-)
-
-// DefaultBitrotAlgorithm is the default algorithm used for bitrot protection.
-const (
-	DefaultBitrotAlgorithm = HighwayHash256S
-)
-
 var bitrotAlgorithms = map[BitrotAlgorithm]string{
 	SHA256:          "sha256",
 	BLAKE2b512:      "blake2b",