piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 28b4ab784ddee8e67afcce4bfd712fda6f9f4092

Nick Mathewson 28b4ab784d Remove one changes files from master (0.2.7) that already got merged into changelogs for 0.2.6.4-rc		%!s(int64=11) %!d(string=hai) anos
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bug14806	034f51dd02 Be exact about the number of spaces in the header.	%!s(int64=11) %!d(string=hai) anos
bug14922	320a68026e changes file for 14922	%!s(int64=11) %!d(string=hai) anos
bug14987b-doc	cf55070e2c Standardize on calling them "server descriptors".	%!s(int64=11) %!d(string=hai) anos
feature15180	9dc90a5b7b Add `check-changes` rule for checking formatting of changes files.	%!s(int64=11) %!d(string=hai) anos