Change default value for download retry time to 10s. Slightly more help output.
Change default value for download retry time to 10s. Slightly more help output.

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs