misc: rename namespace jami to namespace dhtnet

Change-Id: I904ec8fa1f35dfdcf1aabd5f1ec8d95989ad0696
diff --git a/include/tls_session.h b/include/tls_session.h
index 87e84a2..d0adb63 100644
--- a/include/tls_session.h
+++ b/include/tls_session.h
@@ -155,4 +155,4 @@
 };
 
 } // namespace tls
-} // namespace jami
+} // namespace dhtnet