piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 6965a4696cf3b00a1f385cf3f3a562897fefdb09

Nick Mathewson b9480620c6 Make log_fn work on apples with no workarounds needed in main code		22 lat temu
..
CLIENTS	f8c6339979 update docs to reflect a bit more reality	23 lat temu
FAQ	e0d734eb69 update based on discussions at discex iii	23 lat temu
HACKING	1ae95f66ed bring docs closer to reality	23 lat temu
TODO	430545432f and update the todo	22 lat temu
rendezvous.txt	cb8ebfcf29 folding in nick's suggestion	22 lat temu
tor-spec.txt	b9480620c6 Make log_fn work on apples with no workarounds needed in main code	22 lat temu