int send_queued_chunks(int fd, struct chunk_queue *cq,
size_t max_bytes_per_write);
int parse_fec_url(const char *arg, struct sender_command_data *scd);
int send_queued_chunks(int fd, struct chunk_queue *cq,
size_t max_bytes_per_write);
int parse_fec_url(const char *arg, struct sender_command_data *scd);