nlsr: refactor Adjacent to use FaceUri objects

Change-Id: Ib46f70570669c381572182eeea5c047a38a05104
refs: #4063
diff --git a/src/adjacency-list.hpp b/src/adjacency-list.hpp
index c9553de..daceae1 100644
--- a/src/adjacency-list.hpp
+++ b/src/adjacency-list.hpp
@@ -145,8 +145,11 @@
   AdjacencyList::iterator
   findAdjacent(uint64_t faceId);
 
+  AdjacencyList::iterator
+  findAdjacent(const ndn::util::FaceUri& faceUri);
+
   uint64_t
-  getFaceId(const std::string& faceUri);
+  getFaceId(const ndn::util::FaceUri& faceUri);
 
   void
   writeLog();