piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 59029a3eedf934407db17b29be77b89d9a12d77e

Nick Mathewson afc0eb2c71 Tested backends for directory signing and checking. Directory parser completely refactored. Need documentation and integration. Explanitory mail forthcoming.		22 rokov pred
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CLIENTS	f8c6339979 update docs to reflect a bit more reality	23 rokov pred
FAQ	e0d734eb69 update based on discussions at discex iii	22 rokov pred
HACKING	1ae95f66ed bring docs closer to reality	23 rokov pred
TODO	afc0eb2c71 Tested backends for directory signing and checking. Directory parser completely refactored. Need documentation and integration. Explanitory mail forthcoming.	22 rokov pred
tor-spec.txt	f8c6339979 update docs to reflect a bit more reality	23 rokov pred