add naming to threads

Signed-off-by: R4SAS <r4sas@i2pmail.org>

libi2pd_client/AddressBook.cpp

@@ -748,6 +748,7 @@ namespace client
 
 	void AddressBookSubscription::CheckUpdates ()
 	{
+		pthread_setname_np(pthread_self(), "Addressbook");
 		bool result = MakeRequest ();
 		m_Book.DownloadComplete (result, m_Ident, m_Etag, m_LastModified);
 	}