face: eliminate Transport::Packet wrapper type

Refs: #4843
Change-Id: I5977be55e8bdac33c989e3b8523fea764f304c37
diff --git a/daemon/face/internal-transport.hpp b/daemon/face/internal-transport.hpp
index f859099..71ae4d5 100644
--- a/daemon/face/internal-transport.hpp
+++ b/daemon/face/internal-transport.hpp
@@ -42,7 +42,7 @@
   ~InternalTransportBase() = default;
 
   virtual void
-  receivePacket(Block&& packet) = 0;
+  receivePacket(const Block& packet) = 0;
 };
 
 /** \brief Implements a forwarder-side transport that can be paired with another transport.
@@ -63,7 +63,7 @@
   }
 
   void
-  receivePacket(Block&& packet) final;
+  receivePacket(const Block& packet) final;
 
 protected:
   void
@@ -71,7 +71,7 @@
 
 private:
   void
-  doSend(Packet&& packet) final;
+  doSend(const Block& packet, const EndpointId& endpoint) final;
 
 private:
   NFD_LOG_MEMBER_DECL();
@@ -98,7 +98,7 @@
   connectToForwarder(InternalForwarderTransport* forwarder);
 
   void
-  receivePacket(Block&& packet) final;
+  receivePacket(const Block& packet) final;
 
   void
   send(const Block& wire) final;