Refactor the cluster listener (#6232)

* Port over OSS cluster port refactor components

* Start forwarding

* Cleanup a bit

* Fix copy error

* Return error from perf standby creation

* Add some more comments

* Fix copy/paste error

helper/certutil/types.go

@@ -17,12 +17,21 @@ import (
 	"crypto/x509"
 	"encoding/pem"
 	"fmt"
+	"math/big"
 	"strings"
 
 	"github.com/hashicorp/errwrap"
 	"github.com/hashicorp/vault/helper/errutil"
 )
 
+// This can be one of a few key types so the different params may or may not be filled
+type ClusterKeyParams struct {
+	Type string   `json:"type" structs:"type" mapstructure:"type"`
+	X    *big.Int `json:"x" structs:"x" mapstructure:"x"`
+	Y    *big.Int `json:"y" structs:"y" mapstructure:"y"`
+	D    *big.Int `json:"d" structs:"d" mapstructure:"d"`
+}
+
 // Secret is used to attempt to unmarshal a Vault secret
 // JSON response, as a convenience
 type Secret struct {