Dates related to [#17473](https://trac.torproject.org/projects/tor/ticket/17473), fingerprint change for meek-amazon. ([diff](https://trac.torproject.org/projects/tor/wiki/doc/MetricsTimeline?action=diff&version=143)) URL: https://trac.torproject.org/projects/tor/wiki/doc/MetricsTimeline?version=143