add plugin http handler (#7289)

plugin/rpcplugin/api.go

@@ -26,11 +26,6 @@ func (h *LocalAPI) LoadPluginConfiguration(args struct{}, reply *[]byte) error {
 	return nil
 }
 
-type RemoteAPI struct {
-	client *rpc.Client
-	muxer  *Muxer
-}
-
 func ServeAPI(api plugin.API, conn io.ReadWriteCloser, muxer *Muxer) {
 	server := rpc.NewServer()
 	server.Register(&LocalAPI{
@@ -40,6 +35,11 @@ func ServeAPI(api plugin.API, conn io.ReadWriteCloser, muxer *Muxer) {
 	server.ServeConn(conn)
 }
 
+type RemoteAPI struct {
+	client *rpc.Client
+	muxer  *Muxer
+}
+
 var _ plugin.API = (*RemoteAPI)(nil)
 
 func (h *RemoteAPI) LoadPluginConfiguration(dest interface{}) error {