docs: improve Doxygen comments.

refs: #1435

Change-Id: I21624ef4eec393c82a50229a07e8277fb6ae4ddf
diff --git a/src/lsa.cpp b/src/lsa.cpp
index 753ace3..410d56a 100644
--- a/src/lsa.cpp
+++ b/src/lsa.cpp
@@ -248,7 +248,6 @@
   return m_adl == alsa.getAdl();
 }
 
-
 string
 AdjLsa::getData()
 {
@@ -311,11 +310,13 @@
   return true;
 }
 
-
 void
 AdjLsa::addNptEntries(Nlsr& pnlsr)
 {
+  // Only add NPT entries if this is an adj LSA from another router.
   if (getOrigRouter() != pnlsr.getConfParameter().getRouterPrefix()) {
+    // Pass the originating router as both the name to register and
+    // where it came from.
     pnlsr.getNamePrefixTable().addEntry(getOrigRouter(), getOrigRouter());
   }
 }