Add comment note (#3093)

models/admin.go

@@ -74,9 +74,11 @@ func CreateRepositoryNotice(desc string) error {
 // creates a system notice when error occurs.
 func RemoveAllWithNotice(title, path string) {
 	var err error
+	// workaround for Go not being able to remove read-only files/folders: https://github.com/golang/go/issues/9606
+	// this bug should be fixed on Go 1.7, so the workaround should be removed when Gogs don't support Go 1.6 anymore:
+	// https://github.com/golang/go/commit/2ffb3e5d905b5622204d199128dec06cefd57790
 	if setting.IsWindows {
-		// usually Go automatically converts "/" to "\" in path on Windows
-		// but since we are running it manually, it's better to convert to prevent problems
+		// converting "/" to "\" in path on Windows
 		path = strings.Replace(path, "/", "\\", -1)
 		err = exec.Command("cmd", "/C", "rmdir", "/S", "/Q", path).Run()
 	} else {