Avoid copying data into circular buffer

--HG--
branch : nocircbuffer

netio.h

@@ -27,6 +27,7 @@ struct dropbear_progress_connection;
 errstring is only set on DROPBEAR_FAILURE, returns failure message for the last attempted socket */
 typedef void(*connect_callback)(int result, int sock, void* data, const char* errstring);
 
+/* Always returns a progress connection, if it fails it will call the callback at a later point */
 struct dropbear_progress_connection * connect_remote (const char* remotehost, const char* remoteport,
 	connect_callback cb, void *cb_data);