Server 2.10.1: remote management from the MSCO Launcher

- Polls the keymaster every 5 s for commands from the owner's launcher, runs only allowed
  commands (say, kick, ban, save, backup, restart, mods reload, status, players), sends results
  and the player list back
- RemoteManagement in server.json / web panel settings (on by default) to turn it off

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ServerConfig.cs

@@ -41,6 +41,11 @@ public sealed class ServerConfig
     // ---------------------------------------------------------------- Web-Panel
     /// <summary>Web-Panel einschalten.</summary>
     public bool PanelEnabled { get; set; } = true;
+    /// <summary>
+    /// Verwalten aus dem MSCO Launcher: wer den Server dort mit dem Lizenzschlüssel verknüpft hat, kann über den Keymaster
+    /// Befehle schicken (say, kick, ban, save, backup, restart, mods reload, status, players). false = aus.
+    /// </summary>
+    public bool RemoteManagement { get; set; } = true;
     /// <summary>0 = derselbe Port wie der Gameserver (Browser und Spiel werden automatisch unterschieden), sonst eigener Port.</summary>
     public int PanelPort { get; set; } = 0;
     /// <summary>Nur bei eigenem PanelPort: Adresse, auf der gelauscht wird ("0.0.0.0" = alle, "127.0.0.1" = nur lokal, z.B. hinter einem Proxy).</summary>