migrate to dhtnet namespace

Change-Id: I7143a010bd83e8cfa7a3c8c3072ed23f6f0ba8e3
diff --git a/include/ip_utils.h b/include/ip_utils.h
index c720aa1..f37e80a 100644
--- a/include/ip_utils.h
+++ b/include/ip_utils.h
@@ -59,7 +59,7 @@
 
 #define INVALID_SOCKET (-1)
 
-namespace jami {
+namespace dhtnet {
 
 /**
  * Binary representation of an IP address.