[network] Make it possible to request an answer but have a different command name in the answer.

src/network/command_handler.cpp

@@ -136,11 +136,11 @@ void CommandHandler::install_read_handler(void)
 					    boost::asio::placeholders::bytes_transferred));
 }
 
-void CommandHandler::request_answer(Command* command, t_read_callback on_answer)
+void CommandHandler::request_answer(Command* command, t_read_callback on_answer, std::string name)
 {
-  // We may want to send a command that do not require an answer.
-  if (on_answer)
-    this->install_callback_once(command->get_name(), on_answer);
+  if (name.size() == 0)
+    name = command->get_name();
+  this->install_callback_once(name, on_answer);
   this->send(command);
 }
 

src/network/command_handler.hpp

@@ -49,7 +49,7 @@ public:
    * Sends a command, and use install_callback_once to wait for the answer
    * and call that callback to handle it.
    */
-  void request_answer(Command*, t_read_callback on_answer = 0);
+  void request_answer(Command*, t_read_callback on_answer, std::string name = "");
   /**
    * Install a new callback associated with a command. This callback will
    * be called upon receiving that command.
@@ -120,7 +120,7 @@ private:
   command_queue commands_to_send;
 
   /**
-   * Tells us if we are waiting for an async_write to finish or note.
+   * Tells us if we are waiting for an async_write to finish or not.
    * This must be set to true when calling async_write(), to false
    * in the write handler. It is used by check_commands_to_send.
    */