rotateto
static void rotateto(struct fn *fnp, struct opts *opts, int n,
rotateto(fnp, opts, 0, recentlog, B_FALSE);
rotateto(fnp, opts, 0, recentlog, B_FALSE);
rotateto(newfile, opts, n + 1, recentlog, isgz);
rotateto(gzfnp, opts, n + 1, recentlog, B_TRUE);