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/transport/websocket_test.go

@@ -0,0 +1,76 @@
+package transport_test
+
+import (
+	"context"
+	"crypto/rand"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/go-faster/errors"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/sync/errgroup"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/dcs"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/transport"
+)
+
+func TestWebsocketListener(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+
+	var handler http.Handler
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		handler.ServeHTTP(w, r)
+	}))
+	defer srv.Close()
+
+	listener, h := transport.WebsocketListener(srv.Listener.Addr())
+	handler = h
+	list := dcs.List{
+		Domains: map[int]string{
+			2: srv.URL,
+		},
+	}
+
+	server := transport.Listen(listener)
+	defer server.Close()
+	done := make(chan struct{})
+
+	grp, ctx := errgroup.WithContext(ctx)
+	grp.Go(func() error {
+		defer close(done)
+
+		conn, err := server.Accept()
+		if err != nil {
+			return errors.Wrap(err, "accept")
+		}
+
+		var b bin.Buffer
+		if err := conn.Recv(ctx, &b); err != nil {
+			return errors.Wrap(err, "recv")
+		}
+
+		if err := conn.Send(ctx, &b); err != nil {
+			return errors.Wrap(err, "send")
+		}
+
+		return nil
+	})
+
+	rs := dcs.Websocket(dcs.WebsocketOptions{})
+	conn, err := rs.Primary(ctx, 2, list)
+	a.NoError(err)
+
+	data, err := io.ReadAll(io.LimitReader(rand.Reader, 1024))
+	a.NoError(err)
+	a.NoError(conn.Send(ctx, &bin.Buffer{Buf: data}))
+
+	var b bin.Buffer
+	a.NoError(conn.Recv(ctx, &b))
+	a.Equal(data, b.Buf)
+
+	a.NoError(grp.Wait())
+}