piros/tor: Code added to Tor to support PIR-based onion service descriptor lookups @ 830492fbdaef92ecf82c5bfde9373a2a2d9157d3

Nick Mathewson 830492fbda Merge branch 'bug11156_issue2_squashed'		12 lat temu
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11543	b8fe8ee748 Improved message when running sandbox on Linux without libseccomp	12 lat temu
bug11156	bf7cb6acf6 Don't halt bootstrap to figure out if we should restart PT proxies.	12 lat temu
bug9229_025	7aa2192048 Fix our check for the "first" bridge descriptor.	12 lat temu
bug9963	5b36f0d7e7 Log descriptor-download bootstrapping messages less verbosely	12 lat temu
ticket11528	0b319de60f Elevate server TLS cipher preferences over client	12 lat temu