Use more C++17 features

Mainly structured bindings, inline variables, and class template
argument deduction, plus many more smaller things.

Change-Id: I810d17e0adb470426e4e30c898e03b3140ad052f
diff --git a/daemon/face/face.cpp b/daemon/face/face.cpp
index 6422a39..cc606d0 100644
--- a/daemon/face/face.cpp
+++ b/daemon/face/face.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2017,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -34,7 +34,6 @@
   , afterReceiveNack(service->afterReceiveNack)
   , onDroppedInterest(service->onDroppedInterest)
   , afterStateChange(transport->afterStateChange)
-  , m_id(INVALID_FACEID)
   , m_service(std::move(service))
   , m_transport(std::move(transport))
   , m_counters(m_service->getCounters(), m_transport->getCounters())