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/tgtest/server_options.go

@@ -0,0 +1,75 @@
+package tgtest
+
+import (
+	"io"
+	"time"
+
+	"go.uber.org/zap"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/clock"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/crypto"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/mt"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/mtproto"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/proto"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tmap"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/transport"
+)
+
+// ServerOptions of Server.
+type ServerOptions struct {
+	// DC ID of this server. Default to 2.
+	DC int
+	// Random is random source. Defaults to rand.Reader.
+	Random io.Reader
+	// Logger is instance of zap.Logger. No logs by default.
+	Logger *zap.Logger
+	// Codec constructor.
+	// Defaults to nil (underlying transport server detects protocol automatically).
+	Codec func() transport.Codec
+	// Clock to use. Defaults to clock.System.
+	Clock clock.Clock
+	// MessageID generator. Creates a new proto.MessageIDGen by default.
+	// Clock will be used for creation.
+	MessageID mtproto.MessageIDSource
+	// Types map, used in verbose logging of incoming message.
+	Types *tmap.Map
+	// ReadTimeout is a connection read timeout.
+	ReadTimeout time.Duration
+	// ReadTimeout is a connection write timeout.
+	WriteTimeout time.Duration
+}
+
+func (opt *ServerOptions) setDefaults() {
+	if opt.DC == 0 {
+		opt.DC = 2
+	}
+	if opt.Random == nil {
+		opt.Random = crypto.DefaultRand()
+	}
+	if opt.Logger == nil {
+		opt.Logger = zap.NewNop()
+	}
+
+	// Ignore opt.Codec, will be handled by transport.NewCustomServer.
+
+	if opt.Clock == nil {
+		opt.Clock = clock.System
+	}
+	if opt.MessageID == nil {
+		opt.MessageID = proto.NewMessageIDGen(opt.Clock.Now)
+	}
+	if opt.Types == nil {
+		opt.Types = tmap.New(
+			tg.TypesMap(),
+			mt.TypesMap(),
+			proto.TypesMap(),
+		)
+	}
+	if opt.ReadTimeout == 0 {
+		opt.ReadTimeout = 30 * time.Second
+	}
+	if opt.WriteTimeout == 0 {
+		opt.WriteTimeout = 30 * time.Second
+	}
+}