internal: move packages under this directory (#5836)

* Rename pkg -> internal

* Rename routes -> route

* Move route -> internal/route

* Rename models -> db

* Move db -> internal/db

* Fix route2 -> route

* Move cmd -> internal/cmd

* Bump version

internal/user/user.go

@@ -0,0 +1,18 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package user
+
+import (
+	"os"
+)
+
+func CurrentUsername() string {
+	curUserName := os.Getenv("USER")
+	if len(curUserName) > 0 {
+		return curUserName
+	}
+
+	return os.Getenv("USERNAME")
+}