support custom server options when constructing handlers

useful when implemention your own `main.go`

gengokit/httptransport/templates/server.go

@@ -106,13 +106,14 @@ var (
 
 // MakeHTTPHandler returns a handler that makes a set of endpoints available
 // on predefined paths.
-func MakeHTTPHandler(endpoints Endpoints) http.Handler {
+func MakeHTTPHandler(endpoints Endpoints, options ...httptransport.ServerOption) http.Handler {
 	{{- if .HTTPHelper.Methods}}
 		serverOptions := []httptransport.ServerOption{
 			httptransport.ServerBefore(headersToContext),
 			httptransport.ServerErrorEncoder(errorEncoder),
 			httptransport.ServerAfter(httptransport.SetContentType(contentType)),
 		}
+		serverOptions = append(serverOptions, options...)
 	{{- end }}
 	m := mux.NewRouter()
 

gengokit/template/NAME-service/svc/transport_grpc.gotemplate

@@ -21,10 +21,11 @@ import (
 )
 
 // MakeGRPCServer makes a set of endpoints available as a gRPC {{.Service.Name}}Server.
-func MakeGRPCServer(endpoints Endpoints) pb.{{.Service.Name}}Server {
+func MakeGRPCServer(endpoints Endpoints, options ...grpctransport.ServerOption) pb.{{.Service.Name}}Server {
 	serverOptions := []grpctransport.ServerOption{
-		 grpctransport.ServerBefore(metadataToContext),
+		grpctransport.ServerBefore(metadataToContext),
 	}
+	serverOptions = append(serverOptions, options...)
 	return &grpcServer{
 	// {{ ToLower .Service.Name }}
 	{{range $i := .Service.Methods}}