fw: Strategy::sendInterest allows changing Nonce

This commit also includes some tweaks in forwarding pipelines.

refs #1596

Change-Id: I65a4129be24089357b28fa9d35a3451e0d9ae258
diff --git a/daemon/fw/forwarder.hpp b/daemon/fw/forwarder.hpp
index 744338a..acb0451 100644
--- a/daemon/fw/forwarder.hpp
+++ b/daemon/fw/forwarder.hpp
@@ -114,7 +114,8 @@
   /** \brief outgoing Interest pipeline
    */
   VIRTUAL_WITH_TESTS void
-  onOutgoingInterest(shared_ptr<pit::Entry> pitEntry, Face& outFace);
+  onOutgoingInterest(shared_ptr<pit::Entry> pitEntry, Face& outFace,
+                     bool wantNewNonce = false);
 
   /** \brief Interest reject pipeline
    */