Fix issues with restarting P2P client (#167)

src/KKManager.Updater/Sources/TorrentUpdater.cs

@@ -21,10 +21,11 @@ namespace KKManager.Updater.Sources
     public static class TorrentUpdater
     {
         private static ClientEngine _client;
+        private static bool _eventsInitialized;
         private static async Task<ClientEngine> GetClient()
         {
             // Only runs once the first time
-            if (_client == null)
+            if (!_eventsInitialized)
             {
                 // When waking up from sleep restart all running torrents so they re-announce and such
                 // If sleep happened for a while then the torrent can be stuck for a long time otherwise
@@ -53,6 +54,7 @@ private static async Task<ClientEngine> GetClient()
 #if DEBUG
                 MonoTorrent.Logging.LoggerFactory.Register(className => new MonoTorrent.Logging.TextLogger(Console.Out, className));
 #endif
+                _eventsInitialized = true;
             }
 
             if (_client == null || _client.Disposed)
@@ -347,6 +349,7 @@ public void Move(FileInfo targetpath)
         public static async Task Stop()
         {
             await DisposeClient();
+            _client = null;
         }
 
         public static async Task Start()