net: Providing an interface for mapLocalHost

Contributes to #564 by providing an interface for mapLocalHost
through net -> node interface -> clientModel. Later this value can be
read by GUI to show the local addresses.

src/qt/clientmodel.cpp

@@ -123,6 +123,13 @@ int64_t ClientModel::getHeaderTipTime() const
     return cachedBestHeaderTime;
 }
 
+
+std::map<CNetAddr, LocalServiceInfo> ClientModel::getNetLocalAddresses() const
+{
+    return m_node.getNetLocalAddresses();
+}
+
+
 int ClientModel::getNumBlocks() const
 {
     if (m_cached_num_blocks == -1) {