piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ e50857b67f23d06671d2856a04879c3425747adf

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