Make invoice with route hints

[bleetube]

I'd like to use LSPs like Olympus for inbound liquidity, but some of them only provide unannounced channels. My invoices still work if I use the --private flag when I generate them with route hints. I think satdress does, but I'm not really sure. I believe nostdress does not, because I captured a bolt11 invoice by running ngrep on the port nostdress listens on, and there were no route hints in the decoded payment request.