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/common/privilege-helper.hpp b/daemon/common/privilege-helper.hpp
index f0eb3bd..b26dce6 100644
--- a/daemon/common/privilege-helper.hpp
+++ b/daemon/common/privilege-helper.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2021,  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,
@@ -71,7 +71,7 @@
   {
     raise();
     try {
-      std::forward<F>(f)();
+      std::invoke(std::forward<F>(f));
     }
     catch (...) {
       drop();