ndnpeek: replace --link-file with --fwhint

refs #4207, #5187

Change-Id: I8213e971520d3edab631634a03bf7950d265dc11
diff --git a/tools/peek/ndnpeek/ndnpeek.hpp b/tools/peek/ndnpeek/ndnpeek.hpp
index afb0ea7..ce37712 100644
--- a/tools/peek/ndnpeek/ndnpeek.hpp
+++ b/tools/peek/ndnpeek/ndnpeek.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,
@@ -47,7 +47,7 @@
   Name name;
   bool canBePrefix = false;
   bool mustBeFresh = false;
-  shared_ptr<Link> link;
+  std::vector<Name> forwardingHint;
   time::milliseconds interestLifetime = DEFAULT_INTEREST_LIFETIME;
   optional<uint8_t> hopLimit;
   shared_ptr<Buffer> applicationParameters;