piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 2bc1842aaac1119a840b8ed3fa815c6f71053ac7

Roger Dingledine e50857b67f changes entry for bug 1741		15 rokov pred
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ancient-nondirty-circuits	e50857b67f changes entry for bug 1741	15 rokov pred
leak-weight-params	b1a5888553 fix a memory leak introduced by df1ef2f0f0856af	15 rokov pred