Code added to Tor to support PIR-based onion service descriptor lookups

Roger Dingledine f00ef2098a made it clearer that the ORs currently don't support padding at all %!s(int64=24) %!d(string=hai) anos
src 9a928eeb12 Initial revision %!s(int64=24) %!d(string=hai) anos
TODO f00ef2098a made it clearer that the ORs currently don't support padding at all %!s(int64=24) %!d(string=hai) anos