piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ b5f84fde494833182a52a56d9f8584919915ec40

Nick Mathewson 5c820def99 Merge remote-tracking branch 'sysrqb/bug14802_025'		%!s(int64=11) %!d(string=hai) anos
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bug13796	4785cd3617 changes file for 13796	%!s(int64=11) %!d(string=hai) anos
bug13993	6d8b614729 Avoid logging startup messages twice	%!s(int64=11) %!d(string=hai) anos
bug14184	b101f4e98c Control: getinfo entry-guards report down-since	%!s(int64=11) %!d(string=hai) anos
bug14764	16cf1679e7 Fix scheduler compilation on targets where char is unsigned.	%!s(int64=11) %!d(string=hai) anos
bug14802	9ae321db66 Return 0 when detecting the amount of memory fails	%!s(int64=11) %!d(string=hai) anos