misc: rename namespace jami to namespace dhtnet

Change-Id: I904ec8fa1f35dfdcf1aabd5f1ec8d95989ad0696
diff --git a/src/connectionmanager.cpp b/src/connectionmanager.cpp
index 9d955a5..e5fb500 100644
--- a/src/connectionmanager.cpp
+++ b/src/connectionmanager.cpp
@@ -1680,4 +1680,4 @@
     return pimpl_->config_;
 }
 
-} // namespace jami
+} // namespace dhtnet