piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 36829539d64dab47e07bd619b7b833ef50d26853

Roger Dingledine 36829539d6 Merge branch 'maint-0.2.2'		14 lat temu
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bug4115	0b5d2646d5 bug 4115: make bridges use begindir for their dir fetches	14 lat temu
bug4124	ff8aba7053 bridges should use create_fast cells for their own circuits	14 lat temu