rrdp_filename
if ((fn = rrdp_filename(rr, uri, 0)) == NULL)
path = rrdp_filename(rp->rrdp, rp->repouri, 0);
fn = rrdp_filename(rr, fp->file, 0);
fn = rrdp_filename(rr, fp->file, 1);
if ((fn = rrdp_filename(rr, uri, try++)) == NULL)