-msg_task_t task_message_new(e_message_type type, unsigned int len, const char *issuer_hostname, const char *mailbox);
-msg_task_t task_message_chain_new(const char *issuer_hostname, const char *mailbox, const char* prev, const char *next, const unsigned int num_pieces);
-msg_task_t task_message_data_new(const char *issuer_hostname, const char *mailbox, const char *block, unsigned int len);
+msg_task_t task_message_new(e_message_type type, unsigned int len);
+msg_task_t task_message_chain_new(const char* prev, const char *next, const unsigned int num_pieces);
+msg_task_t task_message_data_new(const char *block, unsigned int len);