piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 32e888631447c609d4903ffb8a302f8194590fc3

Nick Mathewson c4e5296892 Fix memory-counting error in rephist.c. Bug 18651.		8 lat temu
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.dummy	df76da0f3b Add a .dummy file in the changes directory to stop git from removing it	9 lat temu
bug18626	db1352703c Remove spurious exit() calls from configure.ac	8 lat temu
bug18651	c4e5296892 Fix memory-counting error in rephist.c. Bug 18651.	8 lat temu