MINIO_POLICY_PLUGIN_AUTH_TOKEN    (string)    authorization header for plugin hook endpoint
MINIO_POLICY_PLUGIN_ENABLE_HTTP2  (bool)      Enable experimental HTTP2 support to connect to plugin service (default: 'off')
MINIO_POLICY_PLUGIN_COMMENT       (sentence)  optionally add a comment to this setting
```

By default this plugin uses HTTP 1.x. To enable HTTP2 use the `MINIO_POLICY_PLUGIN_ENABLE_HTTP2` environment variable.

## Request and Response

	AuthToken   = "auth_token"
	EnableHTTP2 = "enable_http2"

	EnvPolicyPluginURL         = "MINIO_POLICY_PLUGIN_URL"
	EnvPolicyPluginAuthToken   = "MINIO_POLICY_PLUGIN_AUTH_TOKEN"
	EnvPolicyPluginEnableHTTP2 = "MINIO_POLICY_PLUGIN_ENABLE_HTTP2"
)

// DefaultKVS - default config for Authz plugin config
var (
	DefaultKVS = config.KVS{
		config.KV{
			Key:   URL,
			Value: "",
		},
		config.KV{
			Key:   AuthToken,