piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 30fe9080e70aa2ebdf1c2bf86e98fe46b1ad27e1

Nick Mathewson 30fe9080e7 Fix a dependency: micro-revision.i influences tor_main.o, not tor_main.c		13 lat temu
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bug6778	30fe9080e7 Fix a dependency: micro-revision.i influences tor_main.o, not tor_main.c	13 lat temu
ssize_t_warning	5d679caa32 Fix warning when implicitly casting strlen(microdesc) to int	13 lat temu