[AltServer] Advertises unique server ID + writes to AltStore Info.plist

AltServer adds its own server ID to AltStore’s Info.plist when resigning. This allows AltStore to prefer the server it was installed with.

AltServer/AppDelegate.swift

@@ -28,6 +28,8 @@ class AppDelegate: NSObject, NSApplicationDelegate {
 
     func applicationDidFinishLaunching(_ aNotification: Notification)
     {
+        UserDefaults.standard.registerDefaults()
+        
         UNUserNotificationCenter.current().delegate = self
         ConnectionManager.shared.start()