piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 62babcaf0a88edb081529977981cf8865b32ea21

Nick Mathewson 32d9cea289 Merge remote-tracking branch 'public/bug6853'		13 lat temu
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6044	faab788189 changes file for 6044	13 lat temu
bug6853	414adb237b Parse votes with >31 flags correctly	13 lat temu
bug6861	96d2a21683 Avoid sign-extending when computing rend auth type.	13 lat temu