misc: rename namespace jami to namespace dhtnet

Change-Id: I904ec8fa1f35dfdcf1aabd5f1ec8d95989ad0696
diff --git a/src/ip_utils.cpp b/src/ip_utils.cpp
index abc706c..91df414 100644
--- a/src/ip_utils.cpp
+++ b/src/ip_utils.cpp
@@ -496,4 +496,4 @@
         return false;
     }
 }
-} // namespace jami
+} // namespace dhtnet