fix broken URLs in tor-exit-notice.html
the recent website update causes 404 in the tor-exit-notice.html file
https://gitweb.torproject.org/tor.git/plain/contrib/operator-tools/tor-exit-notice.html
the fix is easy: just add 2019. at the beginning of the domain.
You might also want to enable some redirections on the current website since this html file is widely deployed by exit operators.
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