Prevent adding own host to host list

HyperbolicDownloaderApi/Networking/NetworkSocket.cs

@@ -12,4 +12,19 @@ public class NetworkSocket
         Port = port;
         LastActive = lastActive;
     }
+
+    public override bool Equals(object? obj)
+    {
+        if (obj is not NetworkSocket networkSocket)
+        {
+            return false;
+        }
+
+        return networkSocket.IPAddress == IPAddress && networkSocket.Port == Port;
+    }
+
+    public override int GetHashCode()
+    {
+        return HashCode.Combine(IPAddress, Port);
+    }
 }