TUN-6740: Detect no UDP packets allowed and fallback from QUIC in that case

connection/errors.go

@@ -27,6 +27,10 @@ func (e *EdgeQuicDialError) Error() string {
 	return "failed to dial to edge with quic: " + e.Cause.Error()
 }
 
+func (e *EdgeQuicDialError) Unwrap() error {
+	return e.Cause
+}
+
 // RegisterTunnel error from server
 type ServerRegisterTunnelError struct {
 	Cause     error