move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/connect_test.go

@@ -0,0 +1,46 @@
+package telegram
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/exchange"
+)
+
+type fingerprintNotFoundConn struct{}
+
+func (m fingerprintNotFoundConn) Run(context.Context) error {
+	return exchange.ErrKeyFingerprintNotFound
+}
+
+func (m fingerprintNotFoundConn) Invoke(context.Context, bin.Encoder, bin.Decoder) error {
+	return nil
+}
+
+func (m fingerprintNotFoundConn) Ping(context.Context) error {
+	return nil
+}
+
+func (m fingerprintNotFoundConn) Ready() <-chan struct{} {
+	return nil
+}
+
+func TestClient_reconnectUntilClosed(t *testing.T) {
+	client := Client{
+		newConnBackoff: func() backoff.BackOff {
+			return backoff.NewConstantBackOff(time.Nanosecond)
+		},
+		log: zap.NewNop(),
+	}
+	client.init()
+	client.conn = fingerprintNotFoundConn{}
+
+	ctx := context.Background()
+	require.ErrorIs(t, client.reconnectUntilClosed(ctx), exchange.ErrKeyFingerprintNotFound)
+}