migrate to dhtnet namespace

Change-Id: I7143a010bd83e8cfa7a3c8c3072ed23f6f0ba8e3
diff --git a/src/upnp/protocol/natpmp/nat_pmp.h b/src/upnp/protocol/natpmp/nat_pmp.h
index 68fd28b..1ecf90e 100644
--- a/src/upnp/protocol/natpmp/nat_pmp.h
+++ b/src/upnp/protocol/natpmp/nat_pmp.h
@@ -37,11 +37,11 @@
 #include <atomic>
 #include <thread>
 
-namespace jami {
+namespace dhtnet {
 class IpAddr;
 }
 
-namespace jami {
+namespace dhtnet {
 namespace upnp {
 
 // Requested lifetime in seconds. The actual lifetime might be different.