Add unregistering on telegram conn close

hub/hub.go

 
 		rv, ok = h.subs[key]
 		if !ok {
+			h.logger.Debugw("Create new connection hub",
+				"dc", req.ClientProtocol.DC(),
+				"protocol", req.ClientProtocol.ConnectionProtocol())
 			rv = newConnectionHub(h.logger.With(
 				"dc", req.ClientProtocol.DC(),
 				"protocol", req.ClientProtocol.ConnectionProtocol(),

wrappers/packetack/proxy.go

 	"encoding/binary"
 	"fmt"
 	"net"
+	"sync"
 
 	"github.com/9seconds/mtg/config"
 	"github.com/9seconds/mtg/conntypes"
 	clientIPPort []byte
 	ourIPPort    []byte
 	channelRead  hub.ChannelReadCloser
+	closeOnce    sync.Once
 }
 
 func (w *wrapperProxy) Write(packet conntypes.Packet, acks *conntypes.ConnectionAcks) error {
 }
 
 func (w *wrapperProxy) Close() error {
-	return w.channelRead.Close()
+	w.closeOnce.Do(func() {
+		w.channelRead.Close()
+		hub.Registry.Unregister(w.request.ConnID)
+	})
+	return nil
 }
 
 func NewProxy(request *protocol.TelegramRequest) conntypes.PacketAckReadWriteCloser {