misc: rename namespace jami to namespace dhtnet

Change-Id: I904ec8fa1f35dfdcf1aabd5f1ec8d95989ad0696
diff --git a/src/sip_utils.h b/src/sip_utils.h
index 67238fa..0f02255 100644
--- a/src/sip_utils.h
+++ b/src/sip_utils.h
@@ -167,4 +167,4 @@
 static constexpr int TRANSPORT_INFO_LENGTH {64};
 
 } // namespace sip_utils
-} // namespace jami
+} // namespace dhtnet