Migrate config to KV data format (#8392)

- adding oauth support to MinIO browser (#8400) by @kanagaraj
- supports multi-line get/set/del for all config fields
- add support for comments, allow toggle
- add extensive validation of config before saving
- support MinIO browser to support proper claims, using STS tokens
- env support for all config parameters, legacy envs are also
  supported with all documentation now pointing to latest ENVs
- preserve accessKey/secretKey from FS mode setups
- add history support implements three APIs
  - ClearHistory
  - RestoreHistory
  - ListHistory
- add help command support for each config parameters
- all the bug fixes after migration to KV, and other bug
  fixes encountered during testing.

pkg/quick/quick_test.go

@@ -27,8 +27,6 @@ import (
 	"runtime"
 	"strings"
 	"testing"
-
-	"github.com/tidwall/gjson"
 )
 
 func TestReadVersion(t *testing.T) {
@@ -506,31 +504,3 @@ func TestDeepDiff(t *testing.T) {
 	//		fmt.Printf("DeepDiff[%d]: %s=%v\n", i, field.Name(), field.Value())
 	//	}
 }
-
-func TestCheckDupJSONKeys(t *testing.T) {
-	testCases := []struct {
-		json       string
-		shouldPass bool
-	}{
-		{`{}`, true},
-		{`{"version" : "13"}`, true},
-		{`{"version" : "13", "version": "14"}`, false},
-		{`{"version" : "13", "credential": {"accessKey": "12345"}}`, true},
-		{`{"version" : "13", "credential": {"accessKey": "12345", "accessKey":"12345"}}`, false},
-		{`{"version" : "13", "notify": {"amqp": {"1"}, "webhook":{"3"}}}`, true},
-		{`{"version" : "13", "notify": {"amqp": {"1"}, "amqp":{"3"}}}`, false},
-		{`{"version" : "13", "notify": {"amqp": {"1":{}, "2":{}}}}`, true},
-		{`{"version" : "13", "notify": {"amqp": {"1":{}, "1":{}}}}`, false},
-	}
-
-	for i, testCase := range testCases {
-		err := doCheckDupJSONKeys(gjson.Result{}, gjson.Parse(testCase.json))
-		if testCase.shouldPass && err != nil {
-			t.Errorf("Test %d, should pass but it failed with err = %v", i+1, err)
-		}
-		if !testCase.shouldPass && err == nil {
-			t.Errorf("Test %d, should fail but it succeed.", i+1)
-		}
-	}
-
-}