auth_setdata
int auth_setdata(auth_session_t *, void *, size_t);
DEF_WEAK(auth_setdata);
auth_setdata(as, "", 1);
auth_setdata(as, password, strlen(password) + 1);
auth_setdata(as, challenge, strlen(challenge) + 1);
auth_setdata(as, "", 1);
auth_setdata(as, response, strlen(response) + 1);
auth_setdata(as, "", 1);
PROTO_NORMAL(auth_setdata);
auth_setdata(as, "", 1);
auth_setdata(as, password, strlen(password) + 1);