msg_task_t task_new_find_node(unsigned int sender_id, unsigned int destination_id, char *mailbox, const char *hostname);
msg_task_t task_new_find_node_answer(unsigned int sender_id, unsigned int destination_id, answer_t answer,
char *mailbox, const char *hostname);
msg_task_t task_new_find_node(unsigned int sender_id, unsigned int destination_id, char *mailbox, const char *hostname);
msg_task_t task_new_find_node_answer(unsigned int sender_id, unsigned int destination_id, answer_t answer,
char *mailbox, const char *hostname);