piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ d5c42576a3cde4228ccef6503e92c2a02d8510c0

Roger Dingledine d5c42576a3 more todo edits from today's meeting		23 lat temu
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CLIENTS	7a18057357 starting to document what clients need to do and why	23 lat temu
TODO	d5c42576a3 more todo edits from today's meeting	23 lat temu
tor-spec.txt	9566ac4799 some patches on nick's commit	23 lat temu