piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 1aeaba4906d9f0d8901f3ef928f2cbcd049f1140

Nick Mathewson 90bcfa2274 changes file and docs for 18640.		7 lat temu
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.dummy	df76da0f3b Add a .dummy file in the changes directory to stop git from removing it	9 lat temu
18640	90bcfa2274 changes file and docs for 18640.	7 lat temu