wallet: make the refresh optimizations selectable via command line

Take the opportunity to add a no-coinbase case too, for even faster
sync when an address is known to never have mined to.

src/simplewallet/simplewallet.h

@@ -73,7 +73,7 @@ namespace cryptonote
     bool process_command(const std::vector<std::string> &args);
     std::string get_commands_str();
   private:
-    void handle_command_line(const boost::program_options::variables_map& vm);
+    bool handle_command_line(const boost::program_options::variables_map& vm);
 
     bool run_console_handler();
 
@@ -222,6 +222,8 @@ namespace cryptonote
     std::string m_daemon_host;
     int m_daemon_port;
 
+    tools::wallet2::RefreshType m_refresh_type;
+
     epee::console_handlers_binder m_cmd_binder;
 
     std::unique_ptr<tools::wallet2> m_wallet;