add_new_socket
c = add_new_socket(fd, LISTEN_SOCKET|WAITING_READ|INCLUDE_ERROR_CODE, callback, user);
c = add_new_socket(fd, LISTEN_SOCKET|WAITING_READ, callback, user);
c = add_new_socket(fd, LISTEN_SOCKET|WAITING_READ|ALLOW_HTTP, callback, user);
add_new_socket(c->fd,