src: use /localhop component in Sync prefix

refs: #3627

Change-Id: I666f4072601cf7b66bcde632c31c632fabe6e684
diff --git a/src/conf-parameter.hpp b/src/conf-parameter.hpp
index d062386..c0d719b 100644
--- a/src/conf-parameter.hpp
+++ b/src/conf-parameter.hpp
@@ -120,7 +120,8 @@
   setNetwork(const ndn::Name& networkName)
   {
     m_network = networkName;
-    m_chronosyncPrefix = m_network;
+
+    m_chronosyncPrefix.append("localhop");
     m_chronosyncPrefix.append("NLSR");
     m_chronosyncPrefix.append("sync");