migrate to dhtnet namespace

Change-Id: I7143a010bd83e8cfa7a3c8c3072ed23f6f0ba8e3
diff --git a/src/ice_socket.h b/src/ice_socket.h
index 795185d..5692a7c 100644
--- a/src/ice_socket.h
+++ b/src/ice_socket.h
@@ -29,7 +29,7 @@
 using ssize_t = SSIZE_T;
 #endif
 
-namespace jami {
+namespace dhtnet {
 
 class IceTransport;
 using IceRecvCb = std::function<ssize_t(unsigned char* buf, size_t len)>;