_heim_ipc_create_cred
_heim_ipc_create_cred(uid_t, gid_t, pid_t, pid_t, heim_icred *);
kr = _heim_ipc_create_cred(uid, gid, pid, session, &s->cred);
kr = _heim_ipc_create_cred(uid, gid, pid, session, &s->cred);
_heim_ipc_create_cred(c->unixrights.uid, c->unixrights.gid,