git: openjdk/jdk-sandbox: simpleserver: simple-server: add at since to inner API class

[Chris Hegarty]

Changeset: 01ddf8bd
Author:    Chris Hegarty <chris.hegarty at oracle.com>
Date:      2021-08-24 15:29:54 +0000
URL:       https://git.openjdk.java.net/jdk-sandbox/commit/01ddf8bdd42b1483cd00e444b0fa63a19f830521

simple-server: add at since to inner API class

! src/jdk.httpserver/share/classes/com/sun/net/httpserver/SimpleFileServer.java